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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A186259 a(n) = 7*b_7(n) + 6, where b_7 lists the indices of zeros of the sequence u(n) = abs(u(n-1) - gcd(u(n-1), 7n-1)), u(1) = 1.

Table of values

n a(n)
1 20
2 167
3 797
4 6299
5 48817
6 389437
7 3114313
8 24910031
9 199280101
10 1594149787
11 12752862247
12 102022886167
13 816183074713
14 6529464593329
15 52235716720753
16 417885733765933
17 3343085868722137
18 26744686949777089
19 213957495598165381
20 1711659964119801373

List of values

[20, 167, 797, 6299, 48817, 389437, 3114313, 24910031, 199280101, 1594149787, 12752862247, 102022886167, 816183074713, 6529464593329, 52235716720753, 417885733765933, 3343085868722137, 26744686949777089, 213957495598165381, 1711659964119801373]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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