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 A029476 #38 May 14 2024 10:41:20
%S A029476 1,3,15,16,29,48,75,144,477,6211,16053,32688,40431,66313,129825,
%T A029476 134224,278064,366064,386863,3157824,4446069,6697664,8354233,28775616,
%U A029476 33559488,34107072,38339136,50059629,50280080,71693520,113603184,220308720,247082832,2637755936
%N A029476 Numbers k that divide the (left) concatenation of all numbers <= k written in base 7 (most significant digit on left).
%C A029476 a(40) > 3*10^10. - _Jason Yuen_, May 14 2024
%H A029476 Jason Yuen, <a href="/A029476/b029476.txt">Table of n, a(n) for n = 1..39</a>
%H A029476 <a href="/index/N#concat">Index entries for related sequences</a>
%e A029476 15 is a term: 212016151413121110654321_7 = 59785983230307066720 = 15 * 3985732215353804448.
%t A029476 b = 7; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[IntegerDigits[#, b], c], b], #] &] (* _Robert Price_, Mar 12 2020 *)
%Y A029476 Cf. A007093.
%Y A029476 Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978.
%K A029476 nonn,base
%O A029476 1,2
%A A029476 _Olivier Gérard_
%E A029476 More terms from 6211 from Andrew Gacek (andrew(AT)dgi.net), Feb 20 2000
%E A029476 More terms from Larry Reeves (larryr(AT)acm.org), Sep 29 2001
%E A029476 Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002
%E A029476 a(20)-a(30) from _Max Alekseyev_, May 13 2011