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 A029516 #20 Mar 13 2020 12:53:13
%S A029516 1,11,33,48,112,165,176,209,528,720,1584,2123,2717,6919,9680,18080,
%T A029516 23991,47597,58656,75213,106815,111392,253792,278245,343409,502523,
%U A029516 528128,934560
%N A029516 Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 23 (most significant digit on right).
%C A029516 This sequence differs from A061952 in that all least significant zeros are kept during concatenation.
%C A029516 No more terms < 10^7. - _Lars Blomberg_, Oct 14 2011
%H A029516 <a href="/index/N#concat">Index entries for related sequences</a>
%e A029516 See A029495 for example.
%t A029516 b = 23; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[c, Reverse[IntegerDigits[#, b]]], b], #] &] (* _Robert Price_, Mar 13 2020 *)
%Y A029516 Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978.
%K A029516 nonn,base,more
%O A029516 1,2
%A A029516 _Olivier Gérard_
%E A029516 Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002, Aug 25 2002
%E A029516 a(28) from _Lars Blomberg_, Oct 14 2011