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%I #19 Dec 05 2020 23:31:22
%S 1,3,9,15,21,25,35,47,48,87,240,320,672,896,1760,2592,2688,3659,5152,
%T 15456,16800,53200,60288,75360,92605,92736,121600,189648,204176,
%U 334827,382368,401472,443919,1070720,1836855,2010432,4384128,5566077
%N Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 13 (most significant digit on right).
%C This sequence differs from A061942 in that all least significant zeros are kept during concatenation.
%C No more terms < 10^7. - _Lars Blomberg_, Oct 07 2011
%H <a href="/index/N#concat">Index entries for related sequences</a>
%e See A029495 for example.
%t b = 13; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[c, Reverse[IntegerDigits[#, b]]], b], #] &] (* _Robert Price_, Mar 12 2020 *)
%o (PARI) lista(nn, m=13) = my(s, t); for(k=1, nn, s=k; while(s, t=t*m+s%m; s\=m); if(t%k==0, print1(k, ", "))); \\ _Jinyuan Wang_, Dec 05 2020
%Y Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978.
%K nonn,base
%O 1,2
%A _Olivier Gérard_
%E Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002
%E Additional comments and more terms from Larry Reeves (larryr(AT)acm.org), May 25 2001
%E a(33)-a(38) from _Lars Blomberg_, Oct 07 2011
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