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.
%I A029500 #21 Jan 14 2025 11:09:56
%S A029500 1,3,11,16,48,480,947,1111,1137,1367,2125,6351,6841,8209,11392,32931,
%T A029500 166413,173904,263547,284047,634832,690589,2495931,6696245,7004640
%N A029500 Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 7 (most significant digit on right).
%C A029500 This sequence differs from A061936 in that all least significant zeros are kept during concatenation.
%C A029500 No more terms < 10^7. - _Lars Blomberg_, Oct 03 2011
%H A029500 <a href="/index/N#concat">Index entries for related sequences</a>
%e A029500 See A029495 for example.
%t A029500 b = 7; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[c, Reverse[IntegerDigits[#, b]]], b], #] &] (* _Robert Price_, Mar 12 2020 *)
%Y A029500 Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978.
%K A029500 nonn,base,more
%O A029500 1,2
%A A029500 _Olivier Gérard_
%E A029500 Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002
%E A029500 Additional comments and more terms from Larry Reeves (larryr(AT)acm.org), May 25 2001
%E A029500 a(21)-a(25) from _Lars Blomberg_, Oct 03 2011