Sequence Database

A database with 1693109 machine generated integer and decimal sequences.

Displaying result 0-99 of total 108474. [0] [1] [2] [3] [4] ... [1084]

Sequence sbudzke0snrw

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 km0abwnc2qkzp

-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 avy1fjhbbquzj

-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 jdxvlfvkkc3bg

-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 bs2v0zwc0oiph

-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 zleajvmdgnisn

-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 o5up4jbnbro4c

-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 ndsk5y4vg40pl

-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 hdldjalcivauf

-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 hvdnsplw53o4c

-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 k5nh0skvbel5c

-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 bjevm4xxlqtin

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 12ypn4kldaxwk

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 f2ms3bgb3qnfc

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, more...

decimal, non-monotonic, +

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

Sequence wivfm3st2vatf

0.1111111111111111, 0.3333333333333333, 0.4444444444444444, 0.7777777777777778, 0.6666666666666666, 1.3333333333333333, 0.8888888888888888, 1.6666666666666667, 1.4444444444444444, 2, 1.3333333333333333, 3.111111111111111, 1.5555555555555556, 2.6666666666666665, 2.6666666666666665, 3.4444444444444446, 2, 4.333333333333333, 2.2222222222222223, 4.666666666666667, 3.5555555555555554, 4, 2.6666666666666665, 6.666666666666667, 3.4444444444444446, more...

decimal, non-monotonic, +

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

Sequence we2fblhvfm4c

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, more...

decimal, non-monotonic, +

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

Sequence ycvvgdxz54bac

0.14285714285714285, 0.42857142857142855, 0.5714285714285714, 1, 0.8571428571428571, 1.7142857142857142, 1.1428571428571428, 2.142857142857143, 1.8571428571428572, 2.5714285714285716, 1.7142857142857142, 4, 2, 3.4285714285714284, 3.4285714285714284, 4.428571428571429, 2.5714285714285716, 5.571428571428571, 2.857142857142857, 6, 4.571428571428571, 5.142857142857143, 3.4285714285714284, 8.571428571428571, 4.428571428571429, more...

decimal, non-monotonic, +

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

Sequence ywhntzzfnlxvc

0.16666666666666666, 0.5, 0.6666666666666666, 1.1666666666666667, 1, 2, 1.3333333333333333, 2.5, 2.1666666666666665, 3, 2, 4.666666666666667, 2.3333333333333335, 4, 4, 5.166666666666667, 3, 6.5, 3.3333333333333335, 7, 5.333333333333333, 6, 4, 10, 5.166666666666667, more...

decimal, non-monotonic, +

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

Sequence ay1vq4qsb2nrp

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, more...

decimal, non-monotonic, +

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

Sequence kdirlkbdysnwk

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, more...

decimal, non-monotonic, +

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

Sequence jxwmn22ucghon

0.3333333333333333, 1, 1.3333333333333333, 2.3333333333333335, 2, 4, 2.6666666666666665, 5, 4.333333333333333, 6, 4, 9.333333333333334, 4.666666666666667, 8, 8, 10.333333333333334, 6, 13, 6.666666666666667, 14, 10.666666666666666, 12, 8, 20, 10.333333333333334, more...

decimal, non-monotonic, +

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

Sequence tnt133dyyxqjf

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, more...

decimal, non-monotonic, +

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

Sequence whgfjjsqe0e0l

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 s5daevtdqvpyn

1, 0.3333333333333333, 0.25, 0.14285714285714285, 0.16666666666666666, 0.08333333333333333, 0.125, 0.06666666666666667, 0.07692307692307693, 0.05555555555555555, 0.08333333333333333, 0.03571428571428571, 0.07142857142857142, 0.041666666666666664, 0.041666666666666664, 0.03225806451612903, 0.05555555555555555, 0.02564102564102564, 0.05, 0.023809523809523808, 0.03125, 0.027777777777777776, 0.041666666666666664, 0.016666666666666666, 0.03225806451612903, more...

decimal, non-monotonic, +

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

Sequence 2xtoyj0wa05ff

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 aodjpjnubxh3d

2, 0.6666666666666666, 0.5, 0.2857142857142857, 0.3333333333333333, 0.16666666666666666, 0.25, 0.13333333333333333, 0.15384615384615385, 0.1111111111111111, 0.16666666666666666, 0.07142857142857142, 0.14285714285714285, 0.08333333333333333, 0.08333333333333333, 0.06451612903225806, 0.1111111111111111, 0.05128205128205128, 0.1, 0.047619047619047616, 0.0625, 0.05555555555555555, 0.08333333333333333, 0.03333333333333333, 0.06451612903225806, more...

decimal, non-monotonic, +

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

Sequence zvw2e2qgd3zen

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 5m2keomweblrb

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 ymzfy154wv5tm

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 fcgeevxnzkyno

3, 1, 0.75, 0.42857142857142855, 0.5, 0.25, 0.375, 0.2, 0.23076923076923078, 0.16666666666666666, 0.25, 0.10714285714285714, 0.21428571428571427, 0.125, 0.125, 0.0967741935483871, 0.16666666666666666, 0.07692307692307693, 0.15, 0.07142857142857142, 0.09375, 0.08333333333333333, 0.125, 0.05, 0.0967741935483871, more...

decimal, non-monotonic, +

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

Sequence fdixb02rpdud

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 2wkh2fggzxloi

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 4rsflud0v2bzo

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 yokmuquwwakvn

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 b5i2qdd3ndgme

4, 1.3333333333333333, 1, 0.5714285714285714, 0.6666666666666666, 0.3333333333333333, 0.5, 0.26666666666666666, 0.3076923076923077, 0.2222222222222222, 0.3333333333333333, 0.14285714285714285, 0.2857142857142857, 0.16666666666666666, 0.16666666666666666, 0.12903225806451613, 0.2222222222222222, 0.10256410256410256, 0.2, 0.09523809523809523, 0.125, 0.1111111111111111, 0.16666666666666666, 0.06666666666666667, 0.12903225806451613, more...

decimal, non-monotonic, +

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

Sequence cd5wjghy4zwwi

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 bp54reqpvbbxj

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 5ywnnmm51hkqb

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 vpjxpm4ftfxzb

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 xi53g5he3hlkd

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 kqi5jzenzfwrc

5, 1.6666666666666667, 1.25, 0.7142857142857143, 0.8333333333333334, 0.4166666666666667, 0.625, 0.3333333333333333, 0.38461538461538464, 0.2777777777777778, 0.4166666666666667, 0.17857142857142858, 0.35714285714285715, 0.20833333333333334, 0.20833333333333334, 0.16129032258064516, 0.2777777777777778, 0.1282051282051282, 0.25, 0.11904761904761904, 0.15625, 0.1388888888888889, 0.20833333333333334, 0.08333333333333333, 0.16129032258064516, more...

decimal, non-monotonic, +

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

Sequence gu25tawxd5os

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 1ox0tniefjbzp

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 5n325i5qwqk3h

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 baudbunanndgm

6, 2, 1.5, 0.8571428571428571, 1, 0.5, 0.75, 0.4, 0.46153846153846156, 0.3333333333333333, 0.5, 0.21428571428571427, 0.42857142857142855, 0.25, 0.25, 0.1935483870967742, 0.3333333333333333, 0.15384615384615385, 0.3, 0.14285714285714285, 0.1875, 0.16666666666666666, 0.25, 0.1, 0.1935483870967742, more...

decimal, non-monotonic, +

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

Sequence azvugy1bbnwql

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 pigjiqsh1jrvh

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 zmmallfmkh5jk

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 x0n0msahipyfm

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 tww5dj2t4mbxj

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 ueacwznqwlbmp

7, 2.3333333333333335, 1.75, 1, 1.1666666666666667, 0.5833333333333334, 0.875, 0.4666666666666667, 0.5384615384615384, 0.3888888888888889, 0.5833333333333334, 0.25, 0.5, 0.2916666666666667, 0.2916666666666667, 0.22580645161290322, 0.3888888888888889, 0.1794871794871795, 0.35, 0.16666666666666666, 0.21875, 0.19444444444444445, 0.2916666666666667, 0.11666666666666667, 0.22580645161290322, more...

decimal, non-monotonic, +

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

Sequence 43ijrwjoand2b

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 1vjhvuvo1hsbd

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 ojp4rag02dhpe

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 hxc52zcca3oxf

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 kg2itdhpay5to

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, +, A319527

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

Sequence 1wawsfyhosixe

8, 2.6666666666666665, 2, 1.1428571428571428, 1.3333333333333333, 0.6666666666666666, 1, 0.5333333333333333, 0.6153846153846154, 0.4444444444444444, 0.6666666666666666, 0.2857142857142857, 0.5714285714285714, 0.3333333333333333, 0.3333333333333333, 0.25806451612903225, 0.4444444444444444, 0.20512820512820512, 0.4, 0.19047619047619047, 0.25, 0.2222222222222222, 0.3333333333333333, 0.13333333333333333, 0.25806451612903225, more...

decimal, non-monotonic, +

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

Sequence oo5zyrgwd1p1g

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 w1uhlmziwddwc

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 02g2n0gpqhfeo

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 1ixuxyvwcm0zb

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 e14bijywheblj

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, +, A319528

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

Sequence ttb33zii0kj0p

9, 3, 2.25, 1.2857142857142858, 1.5, 0.75, 1.125, 0.6, 0.6923076923076923, 0.5, 0.75, 0.32142857142857145, 0.6428571428571429, 0.375, 0.375, 0.2903225806451613, 0.5, 0.23076923076923078, 0.45, 0.21428571428571427, 0.28125, 0.25, 0.375, 0.15, 0.2903225806451613, more...

decimal, non-monotonic, +

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

Sequence ofh5zljjzuysb

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 133ft25gba2ql

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 ndqoptqf52jto

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 5b15l0lmqrafn

10, 3.3333333333333335, 2.5, 1.4285714285714286, 1.6666666666666667, 0.8333333333333334, 1.25, 0.6666666666666666, 0.7692307692307693, 0.5555555555555556, 0.8333333333333334, 0.35714285714285715, 0.7142857142857143, 0.4166666666666667, 0.4166666666666667, 0.3225806451612903, 0.5555555555555556, 0.2564102564102564, 0.5, 0.23809523809523808, 0.3125, 0.2777777777777778, 0.4166666666666667, 0.16666666666666666, 0.3225806451612903, more...

decimal, non-monotonic, +

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

Sequence vmzzisjmow5fh

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 kgzlsgp1lfzwc

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 nufb5spohptfg

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 bpcwstj1p2pkn

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 iffh3wplfbimj

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 ujwuc01w22zvc

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 i5ydtmgsvrvxd

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 4zoxhwrdkyyui

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 ztidnpriscm1h

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 f5x3revoxk5jg

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 0ntbaysb4glyd

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 wu0ry54ge2swj

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 k2bfzbgmurkhf

0, 0, 0, 0, 0, 8, 8, 8, 8, 0, 8, 8, 8, 8, 8, 8, 0, 0, 0, 8, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 0, 8, 0, 0, 0, 8, 0, 8, 8, 8, 8, 0, 8, 0, 8, 8, 0, 8, 8, 8, more...

integer, non-monotonic, +

a(n)=and(8, σ(n))
σ(n)=divisor sum of n
and(a,b)=bitwise and
n≥1
4 operations
Prime

Sequence sov0s0djus0kb

0, 0, 4, 4, 4, 4, 0, 4, 4, 0, 4, 4, 4, 0, 0, 4, 0, 4, 4, 0, 0, 4, 0, 4, 4, 0, 0, 0, 4, 0, 0, 4, 0, 4, 0, 0, 4, 4, 0, 0, 0, 0, 4, 4, 4, 0, 0, 4, 0, 4, more...

integer, non-monotonic, +

a(n)=and(4, σ(n))
σ(n)=divisor sum of n
and(a,b)=bitwise and
n≥1
4 operations
Prime

Sequence 1r4ef1od01nlc

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 ohlfvykw52n1g

0, 2, 0, 2, 2, 0, 0, 2, 0, 2, 0, 0, 2, 0, 0, 2, 2, 2, 0, 2, 0, 0, 0, 0, 2, 2, 0, 0, 2, 0, 0, 2, 0, 2, 0, 2, 2, 0, 0, 2, 2, 0, 0, 0, 2, 0, 0, 0, 0, 0, more...

integer, non-monotonic, +

a(n)=and(2, σ(n))
σ(n)=divisor sum of n
and(a,b)=bitwise and
n≥1
4 operations
Prime

Sequence tui5tsmacn3hg

0, 2, 0, 2, 2, 8, 8, 10, 8, 2, 8, 8, 10, 8, 8, 10, 2, 2, 0, 10, 0, 0, 8, 8, 10, 10, 8, 8, 10, 8, 0, 10, 0, 2, 0, 10, 2, 8, 8, 10, 10, 0, 8, 0, 10, 8, 0, 8, 8, 8, more...

integer, non-monotonic, +

a(n)=and(10, σ(n))
σ(n)=divisor sum of n
and(a,b)=bitwise and
n≥1
4 operations
Prime

Sequence 1i4uf242up4qp

0, 2, 4, 6, 6, 4, 0, 6, 4, 2, 4, 4, 6, 0, 0, 6, 2, 6, 4, 2, 0, 4, 0, 4, 6, 2, 0, 0, 6, 0, 0, 6, 0, 6, 0, 2, 6, 4, 0, 2, 2, 0, 4, 4, 6, 0, 0, 4, 0, 4, more...

integer, non-monotonic, +

a(n)=and(6, σ(n))
σ(n)=divisor sum of n
and(a,b)=bitwise and
n≥1
4 operations
Prime

Sequence 1nqcxl5sqtw1h

0, 2, 5, 6, 7, 13, 9, 14, 12, 19, 13, 29, 15, 25, 25, 30, 19, 38, 21, 43, 33, 37, 25, 61, 30, 43, 41, 57, 31, 73, 33, 62, 49, 55, 49, 90, 39, 61, 57, 91, 43, 97, 45, 85, 79, 73, 49, 125, 56, 92, more...

integer, non-monotonic, +

a(n)=xor(1, σ(n))
σ(n)=divisor sum of n
xor(a,b)=bitwise exclusive or
n≥1
4 operations
Prime

Sequence 1j3qkd2abihak

1, 0.6666666666666666, 0.75, 0.5714285714285714, 0.8333333333333334, 0.5, 0.875, 0.5333333333333333, 0.6923076923076923, 0.5555555555555556, 0.9166666666666666, 0.42857142857142855, 0.9285714285714286, 0.5833333333333334, 0.625, 0.5161290322580645, 0.9444444444444444, 0.46153846153846156, 0.95, 0.47619047619047616, 0.65625, 0.6111111111111112, 0.9583333333333334, 0.4, 0.8064516129032258, more...

decimal, non-monotonic, +

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

Sequence mwrdpac520vyd

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

integer, non-monotonic, +, A053866

a(n)=and(1, σ(n))
σ(n)=divisor sum of n
and(a,b)=bitwise and
n≥1
4 operations
Prime
a(n)=σ(n)%2
σ(n)=divisor sum of n
n≥1
4 operations
Prime
a(n)=μ(gcd(σ(n), 2)²)
σ(n)=divisor sum of n
gcd(a,b)=greatest common divisor
μ(n)=Möbius function
n≥1
6 operations
Prime

Sequence wj34xwjfq11jd

1, 1, 0, 1, 0, 8, 8, 9, 9, 0, 8, 8, 8, 8, 8, 9, 0, 1, 0, 8, 0, 0, 8, 8, 9, 8, 8, 8, 8, 8, 0, 9, 0, 0, 0, 9, 0, 8, 8, 8, 8, 0, 8, 0, 8, 8, 0, 8, 9, 9, more...

integer, non-monotonic, +

a(n)=and(9, σ(n))
σ(n)=divisor sum of n
and(a,b)=bitwise and
n≥1
4 operations
Prime

Sequence ihigrv3e0fn3l

1, 1, 4, 4, 6, 6, 8, 8, 13, 13, 12, 12, 14, 14, 24, 24, 18, 18, 20, 20, 32, 32, 24, 24, 31, 31, 40, 40, 30, 30, 32, 32, 48, 48, 48, 48, 38, 38, 56, 56, 42, 42, 44, 44, 78, 78, 48, 48, 57, 57, more...

integer, non-monotonic, +

a(n)=σ(or(1, n))
or(a,b)=bitwise or
σ(n)=divisor sum of n
n≥0
4 operations
Prime

Sequence x35mwzesu2ven

1, 1, 4, 5, 4, 4, 0, 5, 5, 0, 4, 4, 4, 0, 0, 5, 0, 5, 4, 0, 0, 4, 0, 4, 5, 0, 0, 0, 4, 0, 0, 5, 0, 4, 0, 1, 4, 4, 0, 0, 0, 0, 4, 4, 4, 0, 0, 4, 1, 5, more...

integer, non-monotonic, +

a(n)=and(5, σ(n))
σ(n)=divisor sum of n
and(a,b)=bitwise and
n≥1
4 operations
Prime

Sequence 0huvkf5aus3jp

1, 1.5, 1.3333333333333333, 1.75, 1.2, 2, 1.1428571428571428, 1.875, 1.4444444444444444, 1.8, 1.0909090909090908, 2.3333333333333335, 1.0769230769230769, 1.7142857142857142, 1.6, 1.9375, 1.0588235294117647, 2.1666666666666665, 1.0526315789473684, 2.1, 1.5238095238095237, 1.6363636363636365, 1.0434782608695652, 2.5, 1.24, more...

decimal, non-monotonic, +

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

Sequence dlokpzgtudmyp

1, 3, 0, 3, 2, 0, 0, 3, 1, 2, 0, 0, 2, 0, 0, 3, 2, 3, 0, 2, 0, 0, 0, 0, 3, 2, 0, 0, 2, 0, 0, 3, 0, 2, 0, 3, 2, 0, 0, 2, 2, 0, 0, 0, 2, 0, 0, 0, 1, 1, more...

integer, non-monotonic, +, A105824

a(n)=and(3, σ(n))
σ(n)=divisor sum of n
and(a,b)=bitwise and
n≥1
4 operations
Prime
a(n)=σ(n)%4
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence za313m52kcskg

1, 3, 4, 7, 6, 4, 0, 7, 5, 2, 4, 4, 6, 0, 0, 7, 2, 7, 4, 2, 0, 4, 0, 4, 7, 2, 0, 0, 6, 0, 0, 7, 0, 6, 0, 3, 6, 4, 0, 2, 2, 0, 4, 4, 6, 0, 0, 4, 1, 5, more...

integer, non-monotonic, +, A105827

a(n)=and(7, σ(n))
σ(n)=divisor sum of n
and(a,b)=bitwise and
n≥1
4 operations
Prime
a(n)=σ(n)%8
σ(n)=divisor sum of n
n≥1
4 operations
Prime

Sequence zs1op2st530jd

1, 3, 5, 7, 7, 13, 9, 15, 13, 19, 13, 29, 15, 25, 25, 31, 19, 39, 21, 43, 33, 37, 25, 61, 31, 43, 41, 57, 31, 73, 33, 63, 49, 55, 49, 91, 39, 61, 57, 91, 43, 97, 45, 85, 79, 73, 49, 125, 57, 93, more...

integer, non-monotonic, +

a(n)=or(1, σ(n))
σ(n)=divisor sum of n
or(a,b)=bitwise or
n≥1
4 operations
Prime

Sequence qs5hkwx2dxagj

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 bcmgdct25n0cb

2, 0, 7, 4, 5, 15, 11, 12, 14, 17, 15, 31, 13, 27, 27, 28, 17, 36, 23, 41, 35, 39, 27, 63, 28, 41, 43, 59, 29, 75, 35, 60, 51, 53, 51, 88, 37, 63, 59, 89, 41, 99, 47, 87, 77, 75, 51, 127, 58, 94, more...

integer, non-monotonic, +

a(n)=xor(3, σ(n))
σ(n)=divisor sum of n
xor(a,b)=bitwise exclusive or
n≥1
4 operations
Prime

Sequence wct0zrzv3qmtd

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

Sequence rjpq3prvhusnc

3, 1, 6, 5, 4, 14, 10, 13, 15, 16, 14, 30, 12, 26, 26, 29, 16, 37, 22, 40, 34, 38, 26, 62, 29, 40, 42, 58, 28, 74, 34, 61, 50, 52, 50, 89, 36, 62, 58, 88, 40, 98, 46, 86, 76, 74, 50, 126, 59, 95, more...

integer, non-monotonic, +

a(n)=xor(2, σ(n))
σ(n)=divisor sum of n
xor(a,b)=bitwise exclusive or
n≥1
4 operations
Prime

Sequence 2yccmfxnqqk4l

3, 3, 6, 7, 6, 14, 10, 15, 15, 18, 14, 30, 14, 26, 26, 31, 18, 39, 22, 42, 34, 38, 26, 62, 31, 42, 42, 58, 30, 74, 34, 63, 50, 54, 50, 91, 38, 62, 58, 90, 42, 98, 46, 86, 78, 74, 50, 126, 59, 95, more...

integer, non-monotonic, +

a(n)=or(2, σ(n))
σ(n)=divisor sum of n
or(a,b)=bitwise or
n≥1
4 operations
Prime

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