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 A061937 #12 Mar 08 2020 14:44:40
%S A061937 1,2,4,6,7,18,21,35,63,105,111,159,217,1183,1330,1353,1449,2023,7223,
%T A061937 8707,10787,13881,58135,1126478,1135315,1141795,1938643,5867454,
%U A061937 9251270
%N A061937 Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 8 (most significant digit on right).
%C A061937 This sequence differs from A029501 in that all least significant zeros are removed before concatenation.
%H A061937 <a href="/index/N#concat">Index entries for related sequences</a>
%e A061937 See A061931 for example.
%t A061937 b = 8; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[c, IntegerDigits[IntegerReverse[#, b], b]], b], #] &] (* _Robert Price_, Mar 08 2020 *)
%Y A061937 Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978.
%K A061937 nonn,base,more
%O A061937 1,2
%A A061937 Larry Reeves (larryr(AT)acm.org), May 24 2001
%E A061937 Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002
%E A061937 6 more terms _Sean A. Irvine_, Sep 03 2009