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 A029522 #26 Jan 13 2025 13:19:51
%S A029522 1,8,16,19,1208,3187,5352,30984,80976,126944,670251,5306279,7640616
%N A029522 Numbers k such that k divides the (left) concatenation of all numbers <= k written in base 5 (most significant digit on right and removing all least significant zeros before concatenation).
%C A029522 This sequence differs from A061958 in that all least significant zeros are removed before concatenation.
%C A029522 No more terms < 10^7. [_Lars Blomberg_, Sep 04 2011]
%H A029522 <a href="/index/N#concat">Index entries for related sequences</a>
%e A029522 See A029519 for example.
%t A029522 b = 5; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[IntegerDigits[IntegerReverse[#, b], b], c], b], #] &] (* _Robert Price_, Mar 13 2020 *)
%Y A029522 Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978.
%K A029522 nonn,base,more
%O A029522 1,2
%A A029522 _Olivier Gérard_
%E A029522 Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002
%E A029522 Additional comments and more terms from Larry Reeves (larryr(AT)acm.org), May 25 2001
%E A029522 a(11)-a(13) from _Lars Blomberg_, Sep 04 2011