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 A029491 #24 Jun 30 2024 03:18:17
%S A029491 1,3,7,9,21,49,59,67,89,147,353,1057,1773,4711,6943,29691,40719,51309,
%T A029491 57533,116881,155769,178311,207123,9111701,9636685,10090955,14397327,
%U A029491 21361545,23023665,50170565,55533513,72268665,316155105,635174505,780744111,932896685
%N A029491 Numbers k that divide the (left) concatenation of all numbers <= k written in base 22 (most significant digit on left).
%C A029491 a(52) > 3*10^10. - _Jason Yuen_, Jun 30 2024
%H A029491 Jason Yuen, <a href="/A029491/b029491.txt">Table of n, a(n) for n = 1..51</a>
%H A029491 <a href="/index/N#concat">Index entries for related sequences</a>
%t A029491 b = 22; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[IntegerDigits[#, b], c], b], #] &] (* _Robert Price_, Mar 12 2020 *)
%Y A029491 Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978.
%K A029491 nonn,base
%O A029491 1,2
%A A029491 _Olivier Gérard_
%E A029491 More terms from Andrew Gacek (andrew(AT)dgi.net), Feb 21 2000
%E A029491 More terms from Larry Reeves (larryr(AT)acm.org), Jun 01 2001
%E A029491 Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002
%E A029491 a(24)-a(32) from _Max Alekseyev_, May 15 2011