Sequence Database

A database with 899757 machine generated integer and decimal sequences.

Found 4 transform matches of a total 272 applied transforms.

Sequence sljca4qd0w2ij

0, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, more...

integer, strictly-monotonic, +

a(n)=comp(ϕ(query(n)))
query(n)=nth term of your query
ϕ(n)=number of relative primes (Euler's totient)
comp(a)=complement function of a (in range)
n≥0
4 operations
Prime
a(n)=comp(σ(4+a(n-1)))
a(0)=1
σ(n)=divisor sum of n
comp(a)=complement function of a (in range)
n≥0
5 operations
Prime

Sequence opkhwhwebtgd

1, 3, 6, 9, 14, 19, 26, 33, 42, 51, 62, 73, 86, 99, 114, 129, 146, 163, 182, 201, 222, 243, 266, 289, 314, 339, 366, 393, 422, 451, 482, 513, 546, 579, 614, 649, 686, 723, 762, 801, 842, 883, 926, 969, 1014, 1059, 1106, 1153, 1202, 1251, more...

integer, strictly-monotonic, +

a(n)=ceil(sqrt(query(n)))
query(n)=nth term of your query
n≥0
4 operations
Power
a(n)=n+a(n-1)%2+a(n-1)
a(0)=1
n≥0
7 operations
Divisibility

Sequence hwswfndcudukl

1, 3, 5, 9, 13, 19, 25, 33, 41, 51, 61, 73, 85, 99, 113, 129, 145, 163, 181, 201, 221, 243, 265, 289, 313, 339, 365, 393, 421, 451, 481, 513, 545, 579, 613, 649, 685, 723, 761, 801, 841, 883, 925, 969, 1013, 1059, 1105, 1153, 1201, 1251, more...

integer, strictly-monotonic, +, A080827

a(n)=round(sqrt(query(n)))
query(n)=nth term of your query
n≥0
4 operations
Power
a(n)=n%2+n+a(n-1)
a(0)=1
n≥0
7 operations
Divisibility

Sequence yebra2vq41n4c

1, 2, 5, 8, 13, 18, 25, 32, 41, 50, 61, 72, 85, 98, 113, 128, 145, 162, 181, 200, 221, 242, 265, 288, 313, 338, 365, 392, 421, 450, 481, 512, 545, 578, 613, 648, 685, 722, 761, 800, 841, 882, 925, 968, 1013, 1058, 1105, 1152, 1201, 1250, more...

integer, strictly-monotonic, +

a(n)=floor(sqrt(query(n)))
query(n)=nth term of your query
n≥0
4 operations
Power
a(n)=1+(1+n)*n-a(n-1)
a(0)=1
n≥0
9 operations
Recursive
a(n)=2*n+a(n-2)%a(n-1)
a(0)=1
a(1)=2
n≥0
7 operations
Divisibility