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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.

A186263 a(n) = 10*b_10(n) + 9, where b_10 lists the indices of zeros of the sequence A261310: u(n) = abs(u(n-1) - gcd(u(n-1), 10n-1)), u(1) = 1.

Table of values

n a(n)
1 29
2 269
3 2969
4 32609
5 357169
6 3928669
7 43213789
8 475113649
9 5226205969
10 57488152069
11 632360271769
12 6955957188049
13 76515529068529
14 841670819753809
15 9258379017291889
16 101842168949117209
17 1120263858440288929
18 12322902442843176229
19 135551926871245562989

List of values

[29, 269, 2969, 32609, 357169, 3928669, 43213789, 475113649, 5226205969, 57488152069, 632360271769, 6955957188049, 76515529068529, 841670819753809, 9258379017291889, 101842168949117209, 1120263858440288929, 12322902442843176229, 135551926871245562989]

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

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