Sequence Database

A database with 734481 machine generated integer and decimal sequences.

Displaying result 0-99 of total 80396. [0] [1] [2] [3] [4] ... [803]

Sequence 4rlzjihdzbx0j

1, 3, 4, 7, 6, 12, 8, 15, 13, 18, 12, 28, 14, 24, 24, 31, 18, 39, 20, 42, 32, 36, 24, 60, 31, 42, 40, 56, 30, 72, 32, 63, 48, 54, 48, 91, 38, 60, 56, 90, 42, 96, 44, 84, 78, 72, 48, 124, 57, 93, more...

integer, non-monotonic, +, A000203

a(n)=σ(n)
σ(n)=divisor sum of n
n≥1
2 operations
Prime

Sequence tilu3ymww05gg

2, 3, 4, 7, 8, 15, 24, 60, 168, 480, 1512, 4800, 15748, 28672, 65528, more...

integer, strictly-monotonic, +, A007497

a(n)=σ(a(n-1))
a(0)=2
σ(n)=divisor sum of n
n≥0
2 operations
Prime

Sequence iejmrcau0ouom

3, 4, 7, 8, 15, 24, 60, 168, 480, 1512, 4800, 15748, 28672, 65528, more...

integer, strictly-monotonic, +

a(n)=σ(a(n-1))
a(0)=3
σ(n)=divisor sum of n
n≥0
2 operations
Prime

Sequence jzj0xqhwtvxnn

4, 7, 8, 15, 24, 60, 168, 480, 1512, 4800, 15748, 28672, 65528, more...

integer, strictly-monotonic, +

a(n)=σ(a(n-1))
a(0)=4
σ(n)=divisor sum of n
n≥0
2 operations
Prime

Sequence 0xuugesife4dh

5, 6, 12, 28, 56, 120, 360, 1170, 3276, 10192, 24738, 61440, more...

integer, strictly-monotonic, +, A051572

a(n)=σ(a(n-1))
a(0)=5
σ(n)=divisor sum of n
n≥0
2 operations
Prime

Sequence qtn4igfox0zfo

-1, -3, -4, -7, -6, -12, -8, -15, -13, -18, -12, -28, -14, -24, -24, -31, -18, -39, -20, -42, -32, -36, -24, -60, -31, -42, -40, -56, -30, -72, -32, -63, -48, -54, -48, -91, -38, -60, -56, -90, -42, -96, -44, -84, -78, -72, -48, -124, -57, -93, more...

integer, non-monotonic, -

a(n)=-σ(n)
σ(n)=divisor sum of n
n≥1
3 operations
Prime

Sequence aefbil5k01xmc

1, 7, 13, 31, 31, 91, 57, 127, 121, 217, 133, 403, 183, 399, 403, 511, 307, 847, 381, 961, 741, 931, 553, 1651, 781, 1281, 1093, 1767, 871, 2821, 993, 2047, 1729, 2149, 1767, 3751, 1407, 2667, 2379, 3937, 1723, 5187, 1893, 4123, 3751, 3871, 2257, 6643, 2801, 5467, more...

integer, non-monotonic, +, A065764

a(n)=σ(n²)
σ(n)=divisor sum of n
n≥1
3 operations
Prime

Sequence z1wbfz52zf3m

1, 9, 16, 49, 36, 144, 64, 225, 169, 324, 144, 784, 196, 576, 576, 961, 324, 1521, 400, 1764, 1024, 1296, 576, 3600, 961, 1764, 1600, 3136, 900, 5184, 1024, 3969, 2304, 2916, 2304, 8281, 1444, 3600, 3136, 8100, 1764, 9216, 1936, 7056, 6084, 5184, 2304, 15376, 3249, 8649, more...

integer, non-monotonic, +, A072861

a(n)=σ(n)²
σ(n)=divisor sum of n
n≥1
3 operations
Prime

Sequence ixqvudtt542ec

1, 1, 3, 1, 4, 3, 4, 1, 7, 4, 6, 3, 6, 4, 7, 1, 6, 7, 8, 4, 15, 6, 8, 3, 8, 6, 15, 4, 8, 7, 6, 1, 12, 6, 13, 7, 12, 8, 18, 4, 12, 15, 14, 6, 28, 8, 13, 3, 13, 8, more...

integer, non-monotonic, +

a(n)=σ(stern(n))
stern(n)=Stern-Brocot sequence
σ(n)=divisor sum of n
n≥1
3 operations
Prime

Sequence bg1403ulfke3p

1, 2, 1, 3, 2, 2, 1, 4, 5, 4, 2, 3, 3, 2, 2, 5, 4, 10, 3, 8, 1, 4, 2, 4, 5, 8, 3, 3, 4, 4, 1, 6, 2, 8, 2, 19, 7, 4, 3, 12, 8, 2, 5, 8, 10, 4, 2, 5, 10, 16, more...

integer, non-monotonic, +

a(n)=stern(σ(n))
σ(n)=divisor sum of n
stern(n)=Stern-Brocot sequence
n≥1
3 operations
Prime

Sequence uzphzxbqwyiif

-9, -7, -6, -3, -4, 2, -2, 5, 3, 8, 2, 18, 4, 14, 14, 21, 8, 29, 10, 32, 22, 26, 14, 50, 21, 32, 30, 46, 20, 62, 22, 53, 38, 44, 38, 81, 28, 50, 46, 80, 32, 86, 34, 74, 68, 62, 38, 114, 47, 83, more...

integer, non-monotonic, +-

a(n)=σ(n)-10
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence tw4nas1clarmn

-8, -6, -5, -2, -3, 3, -1, 6, 4, 9, 3, 19, 5, 15, 15, 22, 9, 30, 11, 33, 23, 27, 15, 51, 22, 33, 31, 47, 21, 63, 23, 54, 39, 45, 39, 82, 29, 51, 47, 81, 33, 87, 35, 75, 69, 63, 39, 115, 48, 84, more...

integer, non-monotonic, +-

a(n)=σ(n)-9
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence shqylv0qeotwf

-7, -5, -4, -1, -2, 4, 0, 7, 5, 10, 4, 20, 6, 16, 16, 23, 10, 31, 12, 34, 24, 28, 16, 52, 23, 34, 32, 48, 22, 64, 24, 55, 40, 46, 40, 83, 30, 52, 48, 82, 34, 88, 36, 76, 70, 64, 40, 116, 49, 85, more...

integer, non-monotonic, +-

a(n)=σ(n)-8
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence xadezooqbqije

-6, -4, -3, 0, -1, 5, 1, 8, 6, 11, 5, 21, 7, 17, 17, 24, 11, 32, 13, 35, 25, 29, 17, 53, 24, 35, 33, 49, 23, 65, 25, 56, 41, 47, 41, 84, 31, 53, 49, 83, 35, 89, 37, 77, 71, 65, 41, 117, 50, 86, more...

integer, non-monotonic, +-

a(n)=σ(n)-7
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence dydnvj1kbu5if

-5, -3, -2, 1, 0, 6, 2, 9, 7, 12, 6, 22, 8, 18, 18, 25, 12, 33, 14, 36, 26, 30, 18, 54, 25, 36, 34, 50, 24, 66, 26, 57, 42, 48, 42, 85, 32, 54, 50, 84, 36, 90, 38, 78, 72, 66, 42, 118, 51, 87, more...

integer, non-monotonic, +-

a(n)=σ(n)-6
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence w0ayw3efonpoj

-4, -2, -1, 2, 1, 7, 3, 10, 8, 13, 7, 23, 9, 19, 19, 26, 13, 34, 15, 37, 27, 31, 19, 55, 26, 37, 35, 51, 25, 67, 27, 58, 43, 49, 43, 86, 33, 55, 51, 85, 37, 91, 39, 79, 73, 67, 43, 119, 52, 88, more...

integer, non-monotonic, +-

a(n)=σ(n)-5
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence g1xerh1ux31hg

-3, -1, 0, 3, 2, 8, 4, 11, 9, 14, 8, 24, 10, 20, 20, 27, 14, 35, 16, 38, 28, 32, 20, 56, 27, 38, 36, 52, 26, 68, 28, 59, 44, 50, 44, 87, 34, 56, 52, 86, 38, 92, 40, 80, 74, 68, 44, 120, 53, 89, more...

integer, non-monotonic, +-

a(n)=σ(n)-4
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence cl1zht4hdfczk

-2.1415926536, -0.1415926536, 0.8584073464, 3.8584073464, 2.8584073464, 8.8584073464, 4.8584073464, 11.8584073464, 9.8584073464, 14.8584073464, 8.8584073464, 24.8584073464, 10.8584073464, 20.8584073464, 20.8584073464, 27.8584073464, 14.8584073464, 35.8584073464, 16.8584073464, 38.8584073464, 28.8584073464, 32.8584073464, 20.8584073464, 56.8584073464, 27.8584073464, 38.8584073464, 36.8584073464, 52.8584073464, 26.8584073464, 68.8584073464, 28.8584073464, 59.8584073464, 44.8584073464, 50.8584073464, 44.8584073464, 87.8584073464, 34.8584073464, 56.8584073464, 52.8584073464, 86.8584073464, 38.8584073464, 92.8584073464, 40.8584073464, 80.8584073464, 74.8584073464, 68.8584073464, 44.8584073464, 120.8584073464, 53.8584073464, 89.8584073464, more...

decimal, non-monotonic, +-

a(n)=σ(n)-π
σ(n)=divisor sum of n
π=3.141...
n≥1
4 operations
Prime

Sequence 4x14a22vqdfal

-2, 0, 1, 4, 3, 9, 5, 12, 10, 15, 9, 25, 11, 21, 21, 28, 15, 36, 17, 39, 29, 33, 21, 57, 28, 39, 37, 53, 27, 69, 29, 60, 45, 51, 45, 88, 35, 57, 53, 87, 39, 93, 41, 81, 75, 69, 45, 121, 54, 90, more...

integer, non-monotonic, +-

a(n)=σ(n)-3
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence cvtthccs1s3nl

-1, 1, 2, 5, 4, 10, 6, 13, 11, 16, 10, 26, 12, 22, 22, 29, 16, 37, 18, 40, 30, 34, 22, 58, 29, 40, 38, 54, 28, 70, 30, 61, 46, 52, 46, 89, 36, 58, 54, 88, 40, 94, 42, 82, 76, 70, 46, 122, 55, 91, more...

integer, non-monotonic, +-

a(n)=σ(n)-2
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence 5hvsftyz2w44n

0, -2, -3, -6, -5, -11, -7, -14, -12, -17, -11, -27, -13, -23, -23, -30, -17, -38, -19, -41, -31, -35, -23, -59, -30, -41, -39, -55, -29, -71, -31, -62, -47, -53, -47, -90, -37, -59, -55, -89, -41, -95, -43, -83, -77, -71, -47, -123, -56, -92, more...

integer, non-monotonic, -

a(n)=1-σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence lzczrqgxjnzeo

0, 2, 3, 6, 5, 11, 7, 14, 12, 17, 11, 27, 13, 23, 23, 30, 17, 38, 19, 41, 31, 35, 23, 59, 30, 41, 39, 55, 29, 71, 31, 62, 47, 53, 47, 90, 37, 59, 55, 89, 41, 95, 43, 83, 77, 71, 47, 123, 56, 92, more...

integer, non-monotonic, +

a(n)=σ(n)-1
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence luq3vykt3u3hk

0.1, 0.3, 0.4, 0.7, 0.6, 1.2, 0.8, 1.5, 1.3, 1.8, 1.2, 2.8, 1.4, 2.4, 2.4, 3.1, 1.8, 3.9, 2, 4.2, 3.2, 3.6, 2.4, 6, 3.1, 4.2, 4, 5.6, 3, 7.2, 3.2, 6.3, 4.8, 5.4, 4.8, 9.1, 3.8, 6, 5.6, 9, 4.2, 9.6, 4.4, 8.4, 7.8, 7.2, 4.8, 12.4, 5.7, 9.3, more...

decimal, non-monotonic, +

a(n)=σ(n)/10
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence 5zrfxvunlpqel

0.1111111111, 0.3333333333, 0.4444444444, 0.7777777778, 0.6666666667, 1.3333333333, 0.8888888889, 1.6666666667, 1.4444444444, 2, 1.3333333333, 3.1111111111, 1.5555555556, 2.6666666667, 2.6666666667, 3.4444444444, 2, 4.3333333333, 2.2222222222, 4.6666666667, 3.5555555556, 4, 2.6666666667, 6.6666666667, 3.4444444444, 4.6666666667, 4.4444444444, 6.2222222222, 3.3333333333, 8, 3.5555555556, 7, 5.3333333333, 6, 5.3333333333, 10.1111111111, 4.2222222222, 6.6666666667, 6.2222222222, 10, 4.6666666667, 10.6666666667, 4.8888888889, 9.3333333333, 8.6666666667, 8, 5.3333333333, 13.7777777778, 6.3333333333, 10.3333333333, more...

decimal, non-monotonic, +

a(n)=σ(n)/9
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence 1yhdqvkscocon

0.125, 0.375, 0.5, 0.875, 0.75, 1.5, 1, 1.875, 1.625, 2.25, 1.5, 3.5, 1.75, 3, 3, 3.875, 2.25, 4.875, 2.5, 5.25, 4, 4.5, 3, 7.5, 3.875, 5.25, 5, 7, 3.75, 9, 4, 7.875, 6, 6.75, 6, 11.375, 4.75, 7.5, 7, 11.25, 5.25, 12, 5.5, 10.5, 9.75, 9, 6, 15.5, 7.125, 11.625, more...

decimal, non-monotonic, +

a(n)=σ(n)/8
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence 5vb0qxmdpzh4g

0.1428571429, 0.4285714286, 0.5714285714, 1, 0.8571428571, 1.7142857143, 1.1428571429, 2.1428571429, 1.8571428571, 2.5714285714, 1.7142857143, 4, 2, 3.4285714286, 3.4285714286, 4.4285714286, 2.5714285714, 5.5714285714, 2.8571428571, 6, 4.5714285714, 5.1428571429, 3.4285714286, 8.5714285714, 4.4285714286, 6, 5.7142857143, 8, 4.2857142857, 10.2857142857, 4.5714285714, 9, 6.8571428571, 7.7142857143, 6.8571428571, 13, 5.4285714286, 8.5714285714, 8, 12.8571428571, 6, 13.7142857143, 6.2857142857, 12, 11.1428571429, 10.2857142857, 6.8571428571, 17.7142857143, 8.1428571429, 13.2857142857, more...

decimal, non-monotonic, +

a(n)=σ(n)/7
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence kgmkl24kfnrqi

0.1666666667, 0.5, 0.6666666667, 1.1666666667, 1, 2, 1.3333333333, 2.5, 2.1666666667, 3, 2, 4.6666666667, 2.3333333333, 4, 4, 5.1666666667, 3, 6.5, 3.3333333333, 7, 5.3333333333, 6, 4, 10, 5.1666666667, 7, 6.6666666667, 9.3333333333, 5, 12, 5.3333333333, 10.5, 8, 9, 8, 15.1666666667, 6.3333333333, 10, 9.3333333333, 15, 7, 16, 7.3333333333, 14, 13, 12, 8, 20.6666666667, 9.5, 15.5, more...

decimal, non-monotonic, +

a(n)=σ(n)/6
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence bfoasldm0dmfd

0.2, 0.6, 0.8, 1.4, 1.2, 2.4, 1.6, 3, 2.6, 3.6, 2.4, 5.6, 2.8, 4.8, 4.8, 6.2, 3.6, 7.8, 4, 8.4, 6.4, 7.2, 4.8, 12, 6.2, 8.4, 8, 11.2, 6, 14.4, 6.4, 12.6, 9.6, 10.8, 9.6, 18.2, 7.6, 12, 11.2, 18, 8.4, 19.2, 8.8, 16.8, 15.6, 14.4, 9.6, 24.8, 11.4, 18.6, more...

decimal, non-monotonic, +

a(n)=σ(n)/5
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence axzhgof4zo0sk

0.25, 0.75, 1, 1.75, 1.5, 3, 2, 3.75, 3.25, 4.5, 3, 7, 3.5, 6, 6, 7.75, 4.5, 9.75, 5, 10.5, 8, 9, 6, 15, 7.75, 10.5, 10, 14, 7.5, 18, 8, 15.75, 12, 13.5, 12, 22.75, 9.5, 15, 14, 22.5, 10.5, 24, 11, 21, 19.5, 18, 12, 31, 14.25, 23.25, more...

decimal, non-monotonic, +

a(n)=σ(n)/4
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence mckwh0l13m2ck

0.3183098862, 0.9549296586, 1.2732395447, 2.2281692033, 1.9098593171, 3.8197186342, 2.5464790895, 4.7746482928, 4.1380285204, 5.7295779513, 3.8197186342, 8.9126768131, 4.4563384066, 7.6394372684, 7.6394372684, 9.8676064717, 5.7295779513, 12.4140855612, 6.3661977237, 13.3690152197, 10.1859163579, 11.4591559026, 7.6394372684, 19.098593171, 9.8676064717, 13.3690152197, 12.7323954474, 17.8253536263, 9.5492965855, 22.9183118052, 10.1859163579, 20.0535228296, 15.2788745368, 17.1887338539, 15.2788745368, 28.9661996427, 12.095775675, 19.098593171, 17.8253536263, 28.6478897565, 13.3690152197, 30.5577490736, 14.0056349921, 26.7380304394, 24.8281711223, 22.9183118052, 15.2788745368, 39.4704258868, 18.1436635125, 29.6028194151, more...

decimal, non-monotonic, +

a(n)=σ(n)/π
σ(n)=divisor sum of n
π=3.141...
n≥1
4 operations
Prime

Sequence r1uy1fpi1znrd

0.3333333333, 1, 1.3333333333, 2.3333333333, 2, 4, 2.6666666667, 5, 4.3333333333, 6, 4, 9.3333333333, 4.6666666667, 8, 8, 10.3333333333, 6, 13, 6.6666666667, 14, 10.6666666667, 12, 8, 20, 10.3333333333, 14, 13.3333333333, 18.6666666667, 10, 24, 10.6666666667, 21, 16, 18, 16, 30.3333333333, 12.6666666667, 20, 18.6666666667, 30, 14, 32, 14.6666666667, 28, 26, 24, 16, 41.3333333333, 19, 31, more...

decimal, non-monotonic, +

a(n)=σ(n)/3
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence tqh1fo1y0hhoe

0.5, 1.5, 2, 3.5, 3, 6, 4, 7.5, 6.5, 9, 6, 14, 7, 12, 12, 15.5, 9, 19.5, 10, 21, 16, 18, 12, 30, 15.5, 21, 20, 28, 15, 36, 16, 31.5, 24, 27, 24, 45.5, 19, 30, 28, 45, 21, 48, 22, 42, 39, 36, 24, 62, 28.5, 46.5, more...

decimal, non-monotonic, +

a(n)=σ(n)/2
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence luu4fxbhkitdc

1, -1, -2, -5, -4, -10, -6, -13, -11, -16, -10, -26, -12, -22, -22, -29, -16, -37, -18, -40, -30, -34, -22, -58, -29, -40, -38, -54, -28, -70, -30, -61, -46, -52, -46, -89, -36, -58, -54, -88, -40, -94, -42, -82, -76, -70, -46, -122, -55, -91, more...

integer, non-monotonic, +-

a(n)=2-σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence 4ju0iswzg32oi

1, 0.3333333333, 0.25, 0.1428571429, 0.1666666667, 0.0833333333, 0.125, 0.0666666667, 0.0769230769, 0.0555555556, 0.0833333333, 0.0357142857, 0.0714285714, 0.0416666667, 0.0416666667, 0.0322580645, 0.0555555556, 0.0256410256, 0.05, 0.0238095238, 0.03125, 0.0277777778, 0.0416666667, 0.0166666667, 0.0322580645, 0.0238095238, 0.025, 0.0178571429, 0.0333333333, 0.0138888889, 0.03125, 0.0158730159, 0.0208333333, 0.0185185185, 0.0208333333, 0.010989011, 0.0263157895, 0.0166666667, 0.0178571429, 0.0111111111, 0.0238095238, 0.0104166667, 0.0227272727, 0.0119047619, 0.0128205128, 0.0138888889, 0.0208333333, 0.0080645161, 0.0175438596, 0.0107526882, more...

decimal, non-monotonic, +

a(n)=1/σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence svjhj5yob14pg

2, 0, -1, -4, -3, -9, -5, -12, -10, -15, -9, -25, -11, -21, -21, -28, -15, -36, -17, -39, -29, -33, -21, -57, -28, -39, -37, -53, -27, -69, -29, -60, -45, -51, -45, -88, -35, -57, -53, -87, -39, -93, -41, -81, -75, -69, -45, -121, -54, -90, more...

integer, non-monotonic, +-

a(n)=3-σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence ig3h2zgqiesuf

2, 0.6666666667, 0.5, 0.2857142857, 0.3333333333, 0.1666666667, 0.25, 0.1333333333, 0.1538461538, 0.1111111111, 0.1666666667, 0.0714285714, 0.1428571429, 0.0833333333, 0.0833333333, 0.064516129, 0.1111111111, 0.0512820513, 0.1, 0.0476190476, 0.0625, 0.0555555556, 0.0833333333, 0.0333333333, 0.064516129, 0.0476190476, 0.05, 0.0357142857, 0.0666666667, 0.0277777778, 0.0625, 0.0317460317, 0.0416666667, 0.037037037, 0.0416666667, 0.021978022, 0.0526315789, 0.0333333333, 0.0357142857, 0.0222222222, 0.0476190476, 0.0208333333, 0.0454545455, 0.0238095238, 0.0256410256, 0.0277777778, 0.0416666667, 0.0161290323, 0.0350877193, 0.0215053763, more...

decimal, non-monotonic, +

a(n)=2/σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence v1xi1vbtj2ndp

2, 4, 5, 8, 7, 13, 9, 16, 14, 19, 13, 29, 15, 25, 25, 32, 19, 40, 21, 43, 33, 37, 25, 61, 32, 43, 41, 57, 31, 73, 33, 64, 49, 55, 49, 92, 39, 61, 57, 91, 43, 97, 45, 85, 79, 73, 49, 125, 58, 94, more...

integer, non-monotonic, +, A088580

a(n)=1+σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence fe15rt30r305

2, 6, 8, 14, 12, 24, 16, 30, 26, 36, 24, 56, 28, 48, 48, 62, 36, 78, 40, 84, 64, 72, 48, 120, 62, 84, 80, 112, 60, 144, 64, 126, 96, 108, 96, 182, 76, 120, 112, 180, 84, 192, 88, 168, 156, 144, 96, 248, 114, 186, more...

integer, non-monotonic, +, A074400

a(n)=2*σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence lc0n5dbppzkmp

2.1415926536, 0.1415926536, -0.8584073464, -3.8584073464, -2.8584073464, -8.8584073464, -4.8584073464, -11.8584073464, -9.8584073464, -14.8584073464, -8.8584073464, -24.8584073464, -10.8584073464, -20.8584073464, -20.8584073464, -27.8584073464, -14.8584073464, -35.8584073464, -16.8584073464, -38.8584073464, -28.8584073464, -32.8584073464, -20.8584073464, -56.8584073464, -27.8584073464, -38.8584073464, -36.8584073464, -52.8584073464, -26.8584073464, -68.8584073464, -28.8584073464, -59.8584073464, -44.8584073464, -50.8584073464, -44.8584073464, -87.8584073464, -34.8584073464, -56.8584073464, -52.8584073464, -86.8584073464, -38.8584073464, -92.8584073464, -40.8584073464, -80.8584073464, -74.8584073464, -68.8584073464, -44.8584073464, -120.8584073464, -53.8584073464, -89.8584073464, more...

decimal, non-monotonic, +-

a(n)=π-σ(n)
π=3.141...
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence l5nkcnqogwtfk

3, 1, 0, -3, -2, -8, -4, -11, -9, -14, -8, -24, -10, -20, -20, -27, -14, -35, -16, -38, -28, -32, -20, -56, -27, -38, -36, -52, -26, -68, -28, -59, -44, -50, -44, -87, -34, -56, -52, -86, -38, -92, -40, -80, -74, -68, -44, -120, -53, -89, more...

integer, non-monotonic, +-

a(n)=4-σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence ys45ep41welgc

3, 1, 0.75, 0.4285714286, 0.5, 0.25, 0.375, 0.2, 0.2307692308, 0.1666666667, 0.25, 0.1071428571, 0.2142857143, 0.125, 0.125, 0.0967741935, 0.1666666667, 0.0769230769, 0.15, 0.0714285714, 0.09375, 0.0833333333, 0.125, 0.05, 0.0967741935, 0.0714285714, 0.075, 0.0535714286, 0.1, 0.0416666667, 0.09375, 0.0476190476, 0.0625, 0.0555555556, 0.0625, 0.032967033, 0.0789473684, 0.05, 0.0535714286, 0.0333333333, 0.0714285714, 0.03125, 0.0681818182, 0.0357142857, 0.0384615385, 0.0416666667, 0.0625, 0.0241935484, 0.0526315789, 0.0322580645, more...

decimal, non-monotonic, +

a(n)=3/σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence i2zaq2h1klr2g

3, 4, 7, 6, 12, 8, 15, 13, 18, 12, 28, 14, 24, 24, 31, 18, 39, 20, 42, 32, 36, 24, 60, 31, 42, 40, 56, 30, 72, 32, 63, 48, 54, 48, 91, 38, 60, 56, 90, 42, 96, 44, 84, 78, 72, 48, 124, 57, 93, 72, more...

integer, non-monotonic, +

a(n)=σ(2+n)
σ(n)=divisor sum of n
n≥0
4 operations
Prime

Sequence k3z0dvbbmpc4b

3, 5, 6, 9, 8, 14, 10, 17, 15, 20, 14, 30, 16, 26, 26, 33, 20, 41, 22, 44, 34, 38, 26, 62, 33, 44, 42, 58, 32, 74, 34, 65, 50, 56, 50, 93, 40, 62, 58, 92, 44, 98, 46, 86, 80, 74, 50, 126, 59, 95, more...

integer, non-monotonic, +

a(n)=2+σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence woqq4zmc41e2k

3, 7, 12, 15, 18, 28, 24, 31, 39, 42, 36, 60, 42, 56, 72, 63, 54, 91, 60, 90, 96, 84, 72, 124, 93, 98, 120, 120, 90, 168, 96, 127, 144, 126, 144, 195, 114, 140, 168, 186, 126, 224, 132, 180, 234, 168, 144, 252, 171, 217, more...

integer, non-monotonic, +, A062731

a(n)=σ(2*n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence 4maycfkxkbmfo

3, 9, 12, 21, 18, 36, 24, 45, 39, 54, 36, 84, 42, 72, 72, 93, 54, 117, 60, 126, 96, 108, 72, 180, 93, 126, 120, 168, 90, 216, 96, 189, 144, 162, 144, 273, 114, 180, 168, 270, 126, 288, 132, 252, 234, 216, 144, 372, 171, 279, more...

integer, non-monotonic, +, A272027

a(n)=3*σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence xrgofbbyzkhpk

3.1415926536, 1.0471975512, 0.7853981634, 0.4487989505, 0.5235987756, 0.2617993878, 0.3926990817, 0.2094395102, 0.2416609734, 0.1745329252, 0.2617993878, 0.1121997376, 0.2243994753, 0.1308996939, 0.1308996939, 0.1013416985, 0.1745329252, 0.0805536578, 0.1570796327, 0.0747998251, 0.0981747704, 0.0872664626, 0.1308996939, 0.0523598776, 0.1013416985, 0.0747998251, 0.0785398163, 0.0560998688, 0.1047197551, 0.0436332313, 0.0981747704, 0.0498665501, 0.0654498469, 0.0581776417, 0.0654498469, 0.0345229962, 0.0826734909, 0.0523598776, 0.0560998688, 0.034906585, 0.0747998251, 0.0327249235, 0.071399833, 0.0373999125, 0.0402768289, 0.0436332313, 0.0654498469, 0.0253354246, 0.0551156606, 0.0337805662, more...

decimal, non-monotonic, +

a(n)=π/σ(n)
π=3.141...
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence w0gm4k5rdnvm

3.1415926536, 9.4247779608, 12.5663706144, 21.9911485751, 18.8495559215, 37.6991118431, 25.1327412287, 47.1238898038, 40.8407044967, 56.5486677646, 37.6991118431, 87.9645943005, 43.9822971503, 75.3982236862, 75.3982236862, 97.3893722613, 56.5486677646, 122.52211349, 62.8318530718, 131.9468914508, 100.5309649149, 113.0973355292, 75.3982236862, 188.4955592154, 97.3893722613, 131.9468914508, 125.6637061436, 175.929188601, 94.2477796077, 226.1946710585, 100.5309649149, 197.9203371762, 150.7964473723, 169.6460032938, 150.7964473723, 285.8849314767, 119.3805208364, 188.4955592154, 175.929188601, 282.7433388231, 131.9468914508, 301.5928947446, 138.230076758, 263.8937829015, 245.04422698, 226.1946710585, 150.7964473723, 389.5574890451, 179.0707812546, 292.1681167839, more...

decimal, non-monotonic, +

a(n)=π*σ(n)
π=3.141...
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence z3auxire5chi

4, 1.3333333333, 1, 0.5714285714, 0.6666666667, 0.3333333333, 0.5, 0.2666666667, 0.3076923077, 0.2222222222, 0.3333333333, 0.1428571429, 0.2857142857, 0.1666666667, 0.1666666667, 0.1290322581, 0.2222222222, 0.1025641026, 0.2, 0.0952380952, 0.125, 0.1111111111, 0.1666666667, 0.0666666667, 0.1290322581, 0.0952380952, 0.1, 0.0714285714, 0.1333333333, 0.0555555556, 0.125, 0.0634920635, 0.0833333333, 0.0740740741, 0.0833333333, 0.043956044, 0.1052631579, 0.0666666667, 0.0714285714, 0.0444444444, 0.0952380952, 0.0416666667, 0.0909090909, 0.0476190476, 0.0512820513, 0.0555555556, 0.0833333333, 0.0322580645, 0.0701754386, 0.0430107527, more...

decimal, non-monotonic, +

a(n)=4/σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence xukyj3enia05g

4, 2, 1, -2, -1, -7, -3, -10, -8, -13, -7, -23, -9, -19, -19, -26, -13, -34, -15, -37, -27, -31, -19, -55, -26, -37, -35, -51, -25, -67, -27, -58, -43, -49, -43, -86, -33, -55, -51, -85, -37, -91, -39, -79, -73, -67, -43, -119, -52, -88, more...

integer, non-monotonic, +-

a(n)=5-σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence vbim02vr0snmn

4, 6, 7, 10, 9, 15, 11, 18, 16, 21, 15, 31, 17, 27, 27, 34, 21, 42, 23, 45, 35, 39, 27, 63, 34, 45, 43, 59, 33, 75, 35, 66, 51, 57, 51, 94, 41, 63, 59, 93, 45, 99, 47, 87, 81, 75, 51, 127, 60, 96, more...

integer, non-monotonic, +

a(n)=3+σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence ng3icavq3kylm

4, 7, 6, 12, 8, 15, 13, 18, 12, 28, 14, 24, 24, 31, 18, 39, 20, 42, 32, 36, 24, 60, 31, 42, 40, 56, 30, 72, 32, 63, 48, 54, 48, 91, 38, 60, 56, 90, 42, 96, 44, 84, 78, 72, 48, 124, 57, 93, 72, 98, more...

integer, non-monotonic, +

a(n)=σ(3+n)
σ(n)=divisor sum of n
n≥0
4 operations
Prime

Sequence fu2eqpp2n5pvi

4, 12, 13, 28, 24, 39, 32, 60, 40, 72, 48, 91, 56, 96, 78, 124, 72, 120, 80, 168, 104, 144, 96, 195, 124, 168, 121, 224, 120, 234, 128, 252, 156, 216, 192, 280, 152, 240, 182, 360, 168, 312, 176, 336, 240, 288, 192, 403, 228, 372, more...

integer, non-monotonic, +, A144613

a(n)=σ(3*n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence awspdc0u1b3hi

4, 12, 16, 28, 24, 48, 32, 60, 52, 72, 48, 112, 56, 96, 96, 124, 72, 156, 80, 168, 128, 144, 96, 240, 124, 168, 160, 224, 120, 288, 128, 252, 192, 216, 192, 364, 152, 240, 224, 360, 168, 384, 176, 336, 312, 288, 192, 496, 228, 372, more...

integer, non-monotonic, +, A239050

a(n)=4*σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence yttbdfy243cwh

4.1415926536, 6.1415926536, 7.1415926536, 10.1415926536, 9.1415926536, 15.1415926536, 11.1415926536, 18.1415926536, 16.1415926536, 21.1415926536, 15.1415926536, 31.1415926536, 17.1415926536, 27.1415926536, 27.1415926536, 34.1415926536, 21.1415926536, 42.1415926536, 23.1415926536, 45.1415926536, 35.1415926536, 39.1415926536, 27.1415926536, 63.1415926536, 34.1415926536, 45.1415926536, 43.1415926536, 59.1415926536, 33.1415926536, 75.1415926536, 35.1415926536, 66.1415926536, 51.1415926536, 57.1415926536, 51.1415926536, 94.1415926536, 41.1415926536, 63.1415926536, 59.1415926536, 93.1415926536, 45.1415926536, 99.1415926536, 47.1415926536, 87.1415926536, 81.1415926536, 75.1415926536, 51.1415926536, 127.1415926536, 60.1415926536, 96.1415926536, more...

decimal, non-monotonic, +

a(n)=π+σ(n)
π=3.141...
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence atudvhoppn2gl

5, 1.6666666667, 1.25, 0.7142857143, 0.8333333333, 0.4166666667, 0.625, 0.3333333333, 0.3846153846, 0.2777777778, 0.4166666667, 0.1785714286, 0.3571428571, 0.2083333333, 0.2083333333, 0.1612903226, 0.2777777778, 0.1282051282, 0.25, 0.119047619, 0.15625, 0.1388888889, 0.2083333333, 0.0833333333, 0.1612903226, 0.119047619, 0.125, 0.0892857143, 0.1666666667, 0.0694444444, 0.15625, 0.0793650794, 0.1041666667, 0.0925925926, 0.1041666667, 0.0549450549, 0.1315789474, 0.0833333333, 0.0892857143, 0.0555555556, 0.119047619, 0.0520833333, 0.1136363636, 0.0595238095, 0.0641025641, 0.0694444444, 0.1041666667, 0.0403225806, 0.0877192982, 0.0537634409, more...

decimal, non-monotonic, +

a(n)=5/σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence 5fwnv3v4xrjg

5, 3, 2, -1, 0, -6, -2, -9, -7, -12, -6, -22, -8, -18, -18, -25, -12, -33, -14, -36, -26, -30, -18, -54, -25, -36, -34, -50, -24, -66, -26, -57, -42, -48, -42, -85, -32, -54, -50, -84, -36, -90, -38, -78, -72, -66, -42, -118, -51, -87, more...

integer, non-monotonic, +-

a(n)=6-σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence bskdk2sjzbnap

5, 7, 8, 11, 10, 16, 12, 19, 17, 22, 16, 32, 18, 28, 28, 35, 22, 43, 24, 46, 36, 40, 28, 64, 35, 46, 44, 60, 34, 76, 36, 67, 52, 58, 52, 95, 42, 64, 60, 94, 46, 100, 48, 88, 82, 76, 52, 128, 61, 97, more...

integer, non-monotonic, +

a(n)=4+σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence xigzx4bh2nqte

5, 15, 20, 35, 30, 60, 40, 75, 65, 90, 60, 140, 70, 120, 120, 155, 90, 195, 100, 210, 160, 180, 120, 300, 155, 210, 200, 280, 150, 360, 160, 315, 240, 270, 240, 455, 190, 300, 280, 450, 210, 480, 220, 420, 390, 360, 240, 620, 285, 465, more...

integer, non-monotonic, +, A274535

a(n)=5*σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence hqgbfx50sxvsf

6, 2, 1.5, 0.8571428571, 1, 0.5, 0.75, 0.4, 0.4615384615, 0.3333333333, 0.5, 0.2142857143, 0.4285714286, 0.25, 0.25, 0.1935483871, 0.3333333333, 0.1538461538, 0.3, 0.1428571429, 0.1875, 0.1666666667, 0.25, 0.1, 0.1935483871, 0.1428571429, 0.15, 0.1071428571, 0.2, 0.0833333333, 0.1875, 0.0952380952, 0.125, 0.1111111111, 0.125, 0.0659340659, 0.1578947368, 0.1, 0.1071428571, 0.0666666667, 0.1428571429, 0.0625, 0.1363636364, 0.0714285714, 0.0769230769, 0.0833333333, 0.125, 0.0483870968, 0.1052631579, 0.064516129, more...

decimal, non-monotonic, +

a(n)=6/σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence 2zwiu20zxcefe

6, 4, 3, 0, 1, -5, -1, -8, -6, -11, -5, -21, -7, -17, -17, -24, -11, -32, -13, -35, -25, -29, -17, -53, -24, -35, -33, -49, -23, -65, -25, -56, -41, -47, -41, -84, -31, -53, -49, -83, -35, -89, -37, -77, -71, -65, -41, -117, -50, -86, more...

integer, non-monotonic, +-

a(n)=7-σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence wicp5ldae2syc

6, 8, 9, 12, 11, 17, 13, 20, 18, 23, 17, 33, 19, 29, 29, 36, 23, 44, 25, 47, 37, 41, 29, 65, 36, 47, 45, 61, 35, 77, 37, 68, 53, 59, 53, 96, 43, 65, 61, 95, 47, 101, 49, 89, 83, 77, 53, 129, 62, 98, more...

integer, non-monotonic, +

a(n)=5+σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence fqwpsub5n55ab

6, 12, 8, 15, 13, 18, 12, 28, 14, 24, 24, 31, 18, 39, 20, 42, 32, 36, 24, 60, 31, 42, 40, 56, 30, 72, 32, 63, 48, 54, 48, 91, 38, 60, 56, 90, 42, 96, 44, 84, 78, 72, 48, 124, 57, 93, 72, 98, 54, 120, more...

integer, non-monotonic, +

a(n)=σ(5+n)
σ(n)=divisor sum of n
n≥0
4 operations
Prime

Sequence akd54mhbujeie

6, 18, 24, 42, 31, 72, 48, 90, 78, 93, 72, 168, 84, 144, 124, 186, 108, 234, 120, 217, 192, 216, 144, 360, 156, 252, 240, 336, 180, 372, 192, 378, 288, 324, 248, 546, 228, 360, 336, 465, 252, 576, 264, 504, 403, 432, 288, 744, 342, 468, more...

integer, non-monotonic, +, A283118

a(n)=σ(5*n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence p4cuwagv3khuf

6, 18, 24, 42, 36, 72, 48, 90, 78, 108, 72, 168, 84, 144, 144, 186, 108, 234, 120, 252, 192, 216, 144, 360, 186, 252, 240, 336, 180, 432, 192, 378, 288, 324, 288, 546, 228, 360, 336, 540, 252, 576, 264, 504, 468, 432, 288, 744, 342, 558, more...

integer, non-monotonic, +, A274536

a(n)=6*σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence k0opo3pru1heo

7, 2.3333333333, 1.75, 1, 1.1666666667, 0.5833333333, 0.875, 0.4666666667, 0.5384615385, 0.3888888889, 0.5833333333, 0.25, 0.5, 0.2916666667, 0.2916666667, 0.2258064516, 0.3888888889, 0.1794871795, 0.35, 0.1666666667, 0.21875, 0.1944444444, 0.2916666667, 0.1166666667, 0.2258064516, 0.1666666667, 0.175, 0.125, 0.2333333333, 0.0972222222, 0.21875, 0.1111111111, 0.1458333333, 0.1296296296, 0.1458333333, 0.0769230769, 0.1842105263, 0.1166666667, 0.125, 0.0777777778, 0.1666666667, 0.0729166667, 0.1590909091, 0.0833333333, 0.0897435897, 0.0972222222, 0.1458333333, 0.0564516129, 0.1228070175, 0.0752688172, more...

decimal, non-monotonic, +

a(n)=7/σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence 5i2ztzpe4lwsk

7, 5, 4, 1, 2, -4, 0, -7, -5, -10, -4, -20, -6, -16, -16, -23, -10, -31, -12, -34, -24, -28, -16, -52, -23, -34, -32, -48, -22, -64, -24, -55, -40, -46, -40, -83, -30, -52, -48, -82, -34, -88, -36, -76, -70, -64, -40, -116, -49, -85, more...

integer, non-monotonic, +-

a(n)=8-σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence dudxs0orgzxid

7, 6, 12, 8, 15, 13, 18, 12, 28, 14, 24, 24, 31, 18, 39, 20, 42, 32, 36, 24, 60, 31, 42, 40, 56, 30, 72, 32, 63, 48, 54, 48, 91, 38, 60, 56, 90, 42, 96, 44, 84, 78, 72, 48, 124, 57, 93, 72, 98, 54, more...

integer, non-monotonic, +

a(n)=σ(4+n)
σ(n)=divisor sum of n
n≥0
4 operations
Prime

Sequence dja50mj2bxnjh

7, 9, 10, 13, 12, 18, 14, 21, 19, 24, 18, 34, 20, 30, 30, 37, 24, 45, 26, 48, 38, 42, 30, 66, 37, 48, 46, 62, 36, 78, 38, 69, 54, 60, 54, 97, 44, 66, 62, 96, 48, 102, 50, 90, 84, 78, 54, 130, 63, 99, more...

integer, non-monotonic, +

a(n)=6+σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence sykykhs35updp

7, 15, 28, 31, 42, 60, 56, 63, 91, 90, 84, 124, 98, 120, 168, 127, 126, 195, 140, 186, 224, 180, 168, 252, 217, 210, 280, 248, 210, 360, 224, 255, 336, 270, 336, 403, 266, 300, 392, 378, 294, 480, 308, 372, 546, 360, 336, 508, 399, 465, more...

integer, non-monotonic, +, A193553

a(n)=σ(4*n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence dng34kpgledlb

7, 21, 28, 49, 42, 84, 56, 105, 91, 126, 84, 196, 98, 168, 168, 217, 126, 273, 140, 294, 224, 252, 168, 420, 217, 294, 280, 392, 210, 504, 224, 441, 336, 378, 336, 637, 266, 420, 392, 630, 294, 672, 308, 588, 546, 504, 336, 868, 399, 651, more...

integer, non-monotonic, +

a(n)=7*σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence wgypk5qqy0dtj

8, 2.6666666667, 2, 1.1428571429, 1.3333333333, 0.6666666667, 1, 0.5333333333, 0.6153846154, 0.4444444444, 0.6666666667, 0.2857142857, 0.5714285714, 0.3333333333, 0.3333333333, 0.2580645161, 0.4444444444, 0.2051282051, 0.4, 0.1904761905, 0.25, 0.2222222222, 0.3333333333, 0.1333333333, 0.2580645161, 0.1904761905, 0.2, 0.1428571429, 0.2666666667, 0.1111111111, 0.25, 0.126984127, 0.1666666667, 0.1481481481, 0.1666666667, 0.0879120879, 0.2105263158, 0.1333333333, 0.1428571429, 0.0888888889, 0.1904761905, 0.0833333333, 0.1818181818, 0.0952380952, 0.1025641026, 0.1111111111, 0.1666666667, 0.064516129, 0.1403508772, 0.0860215054, more...

decimal, non-monotonic, +

a(n)=8/σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence wru23jeokz0m

8, 6, 5, 2, 3, -3, 1, -6, -4, -9, -3, -19, -5, -15, -15, -22, -9, -30, -11, -33, -23, -27, -15, -51, -22, -33, -31, -47, -21, -63, -23, -54, -39, -45, -39, -82, -29, -51, -47, -81, -33, -87, -35, -75, -69, -63, -39, -115, -48, -84, more...

integer, non-monotonic, +-

a(n)=9-σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence ggqrldvjyqpo

8, 10, 11, 14, 13, 19, 15, 22, 20, 25, 19, 35, 21, 31, 31, 38, 25, 46, 27, 49, 39, 43, 31, 67, 38, 49, 47, 63, 37, 79, 39, 70, 55, 61, 55, 98, 45, 67, 63, 97, 49, 103, 51, 91, 85, 79, 55, 131, 64, 100, more...

integer, non-monotonic, +

a(n)=7+σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence g454uopudtvyg

8, 15, 13, 18, 12, 28, 14, 24, 24, 31, 18, 39, 20, 42, 32, 36, 24, 60, 31, 42, 40, 56, 30, 72, 32, 63, 48, 54, 48, 91, 38, 60, 56, 90, 42, 96, 44, 84, 78, 72, 48, 124, 57, 93, 72, 98, 54, 120, 72, 120, more...

integer, non-monotonic, +

a(n)=σ(7+n)
σ(n)=divisor sum of n
n≥0
4 operations
Prime

Sequence rjvpfdvtmuzoj

8, 24, 32, 56, 48, 96, 57, 120, 104, 144, 96, 224, 112, 171, 192, 248, 144, 312, 160, 336, 228, 288, 192, 480, 248, 336, 320, 399, 240, 576, 256, 504, 384, 432, 342, 728, 304, 480, 448, 720, 336, 684, 352, 672, 624, 576, 384, 992, 400, 744, more...

integer, non-monotonic, +, A283078

a(n)=σ(7*n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence q4yclovelze1c

8, 24, 32, 56, 48, 96, 64, 120, 104, 144, 96, 224, 112, 192, 192, 248, 144, 312, 160, 336, 256, 288, 192, 480, 248, 336, 320, 448, 240, 576, 256, 504, 384, 432, 384, 728, 304, 480, 448, 720, 336, 768, 352, 672, 624, 576, 384, 992, 456, 744, more...

integer, non-monotonic, +

a(n)=8*σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence szv2fkrwsj5qm

9, 3, 2.25, 1.2857142857, 1.5, 0.75, 1.125, 0.6, 0.6923076923, 0.5, 0.75, 0.3214285714, 0.6428571429, 0.375, 0.375, 0.2903225806, 0.5, 0.2307692308, 0.45, 0.2142857143, 0.28125, 0.25, 0.375, 0.15, 0.2903225806, 0.2142857143, 0.225, 0.1607142857, 0.3, 0.125, 0.28125, 0.1428571429, 0.1875, 0.1666666667, 0.1875, 0.0989010989, 0.2368421053, 0.15, 0.1607142857, 0.1, 0.2142857143, 0.09375, 0.2045454545, 0.1071428571, 0.1153846154, 0.125, 0.1875, 0.0725806452, 0.1578947368, 0.0967741935, more...

decimal, non-monotonic, +

a(n)=9/σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence nhyfdk1opge3l

9, 7, 6, 3, 4, -2, 2, -5, -3, -8, -2, -18, -4, -14, -14, -21, -8, -29, -10, -32, -22, -26, -14, -50, -21, -32, -30, -46, -20, -62, -22, -53, -38, -44, -38, -81, -28, -50, -46, -80, -32, -86, -34, -74, -68, -62, -38, -114, -47, -83, more...

integer, non-monotonic, +-

a(n)=10-σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence qsnbppylmaxmi

9, 11, 12, 15, 14, 20, 16, 23, 21, 26, 20, 36, 22, 32, 32, 39, 26, 47, 28, 50, 40, 44, 32, 68, 39, 50, 48, 64, 38, 80, 40, 71, 56, 62, 56, 99, 46, 68, 64, 98, 50, 104, 52, 92, 86, 80, 56, 132, 65, 101, more...

integer, non-monotonic, +

a(n)=8+σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence ummqhqkz13llk

9, 27, 36, 63, 54, 108, 72, 135, 117, 162, 108, 252, 126, 216, 216, 279, 162, 351, 180, 378, 288, 324, 216, 540, 279, 378, 360, 504, 270, 648, 288, 567, 432, 486, 432, 819, 342, 540, 504, 810, 378, 864, 396, 756, 702, 648, 432, 1116, 513, 837, more...

integer, non-monotonic, +

a(n)=9*σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence lcdpknxyscptg

10, 3.3333333333, 2.5, 1.4285714286, 1.6666666667, 0.8333333333, 1.25, 0.6666666667, 0.7692307692, 0.5555555556, 0.8333333333, 0.3571428571, 0.7142857143, 0.4166666667, 0.4166666667, 0.3225806452, 0.5555555556, 0.2564102564, 0.5, 0.2380952381, 0.3125, 0.2777777778, 0.4166666667, 0.1666666667, 0.3225806452, 0.2380952381, 0.25, 0.1785714286, 0.3333333333, 0.1388888889, 0.3125, 0.1587301587, 0.2083333333, 0.1851851852, 0.2083333333, 0.1098901099, 0.2631578947, 0.1666666667, 0.1785714286, 0.1111111111, 0.2380952381, 0.1041666667, 0.2272727273, 0.119047619, 0.1282051282, 0.1388888889, 0.2083333333, 0.0806451613, 0.1754385965, 0.1075268817, more...

decimal, non-monotonic, +

a(n)=10/σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence owfqkq0yr00uh

10, 12, 13, 16, 15, 21, 17, 24, 22, 27, 21, 37, 23, 33, 33, 40, 27, 48, 29, 51, 41, 45, 33, 69, 40, 51, 49, 65, 39, 81, 41, 72, 57, 63, 57, 100, 47, 69, 65, 99, 51, 105, 53, 93, 87, 81, 57, 133, 66, 102, more...

integer, non-monotonic, +

a(n)=9+σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence xsurt3u3fur4m

10, 30, 40, 70, 60, 120, 80, 150, 130, 180, 120, 280, 140, 240, 240, 310, 180, 390, 200, 420, 320, 360, 240, 600, 310, 420, 400, 560, 300, 720, 320, 630, 480, 540, 480, 910, 380, 600, 560, 900, 420, 960, 440, 840, 780, 720, 480, 1240, 570, 930, more...

integer, non-monotonic, +

a(n)=10*σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence t4oay4wgjji3p

11, 13, 14, 17, 16, 22, 18, 25, 23, 28, 22, 38, 24, 34, 34, 41, 28, 49, 30, 52, 42, 46, 34, 70, 41, 52, 50, 66, 40, 82, 42, 73, 58, 64, 58, 101, 48, 70, 66, 100, 52, 106, 54, 94, 88, 82, 58, 134, 67, 103, more...

integer, non-monotonic, +

a(n)=10+σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence 4uqfoyaoy5cl

12, 8, 15, 13, 18, 12, 28, 14, 24, 24, 31, 18, 39, 20, 42, 32, 36, 24, 60, 31, 42, 40, 56, 30, 72, 32, 63, 48, 54, 48, 91, 38, 60, 56, 90, 42, 96, 44, 84, 78, 72, 48, 124, 57, 93, 72, 98, 54, 120, 72, more...

integer, non-monotonic, +

a(n)=σ(6+n)
σ(n)=divisor sum of n
n≥0
4 operations
Prime

Sequence uwx0u22zrvi3e

12, 28, 39, 60, 72, 91, 96, 124, 120, 168, 144, 195, 168, 224, 234, 252, 216, 280, 240, 360, 312, 336, 288, 403, 372, 392, 363, 480, 360, 546, 384, 508, 468, 504, 576, 600, 456, 560, 546, 744, 504, 728, 528, 720, 720, 672, 576, 819, 684, 868, more...

integer, non-monotonic, +, A224613

a(n)=σ(6*n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence zndskbborfxdc

13, 18, 12, 28, 14, 24, 24, 31, 18, 39, 20, 42, 32, 36, 24, 60, 31, 42, 40, 56, 30, 72, 32, 63, 48, 54, 48, 91, 38, 60, 56, 90, 42, 96, 44, 84, 78, 72, 48, 124, 57, 93, 72, 98, 54, 120, 72, 120, 80, 90, more...

integer, non-monotonic, +

a(n)=σ(9+n)
σ(n)=divisor sum of n
n≥0
4 operations
Prime

Sequence rmnipbxgv04in

13, 39, 40, 91, 78, 120, 104, 195, 121, 234, 156, 280, 182, 312, 240, 403, 234, 363, 260, 546, 320, 468, 312, 600, 403, 546, 364, 728, 390, 720, 416, 819, 480, 702, 624, 847, 494, 780, 560, 1170, 546, 960, 572, 1092, 726, 936, 624, 1240, 741, 1209, more...

integer, non-monotonic, +, A283123

a(n)=σ(9*n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence mnmvn0yg3qxxb

15, 13, 18, 12, 28, 14, 24, 24, 31, 18, 39, 20, 42, 32, 36, 24, 60, 31, 42, 40, 56, 30, 72, 32, 63, 48, 54, 48, 91, 38, 60, 56, 90, 42, 96, 44, 84, 78, 72, 48, 124, 57, 93, 72, 98, 54, 120, 72, 120, 80, more...

integer, non-monotonic, +

a(n)=σ(8+n)
σ(n)=divisor sum of n
n≥0
4 operations
Prime

Sequence rit0vvnrpq1go

15, 31, 60, 63, 90, 124, 120, 127, 195, 186, 180, 252, 210, 248, 360, 255, 270, 403, 300, 378, 480, 372, 360, 508, 465, 434, 600, 504, 450, 744, 480, 511, 720, 558, 720, 819, 570, 620, 840, 762, 630, 992, 660, 756, 1170, 744, 720, 1020, 855, 961, more...

integer, non-monotonic, +, A283122

a(n)=σ(8*n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence 5mzgcx1n4eqhg

18, 12, 28, 14, 24, 24, 31, 18, 39, 20, 42, 32, 36, 24, 60, 31, 42, 40, 56, 30, 72, 32, 63, 48, 54, 48, 91, 38, 60, 56, 90, 42, 96, 44, 84, 78, 72, 48, 124, 57, 93, 72, 98, 54, 120, 72, 120, 80, 90, 60, more...

integer, non-monotonic, +

a(n)=σ(10+n)
σ(n)=divisor sum of n
n≥0
4 operations
Prime

Sequence wug0mkvynf12

18, 42, 72, 90, 93, 168, 144, 186, 234, 217, 216, 360, 252, 336, 372, 378, 324, 546, 360, 465, 576, 504, 432, 744, 468, 588, 720, 720, 540, 868, 576, 762, 864, 756, 744, 1170, 684, 840, 1008, 961, 756, 1344, 792, 1080, 1209, 1008, 864, 1512, 1026, 1092, more...

integer, non-monotonic, +

a(n)=σ(10*n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence rn4f4ehqo1rdb

1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, more...

integer, non-monotonic, +, A175192

a(n)=cf(σ(n))
σ(n)=divisor sum of n
cf(n)=characteristic function (in range)
n≥1
3 operations
Prime

Sequence p11sz22vsg3re

2, 5, 9, 10, 11, 16, 17, 19, 21, 22, 23, 25, 26, 27, 29, 33, 34, 35, 37, 41, 43, 45, 46, 47, 49, 50, more...

integer, strictly-monotonic, +, A007369

a(n)=comp(σ(n))
σ(n)=divisor sum of n
comp(n)=complement function (in range)
n≥1
3 operations
Prime

Sequence b4n1epjrqdcbo

0, -1, -1, -3, -1, -6, -1, -7, -4, -8, -1, -16, -1, -10, -9, -15, -1, -21, -1, -22, -11, -14, -1, -36, -6, -16, -13, -28, -1, -42, -1, -31, -15, -20, -13, -55, -1, -22, -17, -50, -1, -54, -1, -40, -33, -26, -1, -76, -8, -43, more...

integer, non-monotonic, -

a(n)=n-σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence uxsxpp5axe54p

0, 1, 1, 3, 1, 6, 1, 7, 4, 8, 1, 16, 1, 10, 9, 15, 1, 21, 1, 22, 11, 14, 1, 36, 6, 16, 13, 28, 1, 42, 1, 31, 15, 20, 13, 55, 1, 22, 17, 50, 1, 54, 1, 40, 33, 26, 1, 76, 8, 43, more...

integer, non-monotonic, +, A001065

a(n)=σ(n)-n
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence f1vcge2ucwubn

1, 0.6666666667, 0.75, 0.5714285714, 0.8333333333, 0.5, 0.875, 0.5333333333, 0.6923076923, 0.5555555556, 0.9166666667, 0.4285714286, 0.9285714286, 0.5833333333, 0.625, 0.5161290323, 0.9444444444, 0.4615384615, 0.95, 0.4761904762, 0.65625, 0.6111111111, 0.9583333333, 0.4, 0.8064516129, 0.619047619, 0.675, 0.5, 0.9666666667, 0.4166666667, 0.96875, 0.5079365079, 0.6875, 0.6296296296, 0.7291666667, 0.3956043956, 0.9736842105, 0.6333333333, 0.6964285714, 0.4444444444, 0.9761904762, 0.4375, 0.9772727273, 0.5238095238, 0.5769230769, 0.6388888889, 0.9791666667, 0.3870967742, 0.8596491228, 0.5376344086, more...

decimal, non-monotonic, +

a(n)=n/σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence qnrgrhfxduucg

1, 1.5, 1.3333333333, 1.75, 1.2, 2, 1.1428571429, 1.875, 1.4444444444, 1.8, 1.0909090909, 2.3333333333, 1.0769230769, 1.7142857143, 1.6, 1.9375, 1.0588235294, 2.1666666667, 1.0526315789, 2.1, 1.5238095238, 1.6363636364, 1.0434782609, 2.5, 1.24, 1.6153846154, 1.4814814815, 2, 1.0344827586, 2.4, 1.0322580645, 1.96875, 1.4545454545, 1.5882352941, 1.3714285714, 2.5277777778, 1.027027027, 1.5789473684, 1.4358974359, 2.25, 1.0243902439, 2.2857142857, 1.023255814, 1.9090909091, 1.7333333333, 1.5652173913, 1.0212765957, 2.5833333333, 1.1632653061, 1.86, more...

decimal, non-monotonic, +

a(n)=σ(n)/n
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence pc4eay51oegwc

1, 6, 12, 28, 30, 72, 56, 120, 117, 180, 132, 336, 182, 336, 360, 496, 306, 702, 380, 840, 672, 792, 552, 1440, 775, 1092, 1080, 1568, 870, 2160, 992, 2016, 1584, 1836, 1680, 3276, 1406, 2280, 2184, 3600, 1722, 4032, 1892, 3696, 3510, 3312, 2256, 5952, 2793, 4650, more...

integer, non-monotonic, +, A064987

a(n)=n*σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence b2atuhebcxtjk

2, 5, 7, 11, 11, 18, 15, 23, 22, 28, 23, 40, 27, 38, 39, 47, 35, 57, 39, 62, 53, 58, 47, 84, 56, 68, 67, 84, 59, 102, 63, 95, 81, 88, 83, 127, 75, 98, 95, 130, 83, 138, 87, 128, 123, 118, 95, 172, 106, 143, more...

integer, non-monotonic, +, A155085

a(n)=n+σ(n)
σ(n)=divisor sum of n
n≥1
4 operations
Prime

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