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 A061936 Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 7 (most significant digit on right). 1
 1, 3, 12, 27, 48, 72, 79, 363, 600, 1277, 1289, 1815, 15272, 18492, 38484, 83556, 87312, 148336, 205731, 222176, 420900, 549876, 607797, 624648, 716064, 5651851 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS This sequence differs from A029500 in that all least significant zeros are removed before concatenation. No more terms < 10^7. - Lars Blomberg, Oct 17 2011 LINKS EXAMPLE See A061931 for example. MATHEMATICA b = 7; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[c, IntegerDigits[IntegerReverse[#, b], b]], b], #] &] (* Robert Price, Mar 07 2020 *) PROG (PARI) lista(nn, m=7) = my(s, t); for(k=1, nn, s=k/m^valuation(k, m); while(s, t=t*m+s%m; s\=m); if(t%k==0, print1(k, ", "))); \\ Jinyuan Wang, Dec 05 2020 CROSSREFS Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978. Sequence in context: A345960 A271183 A125614 * A074630 A033428 A213486 Adjacent sequences:  A061933 A061934 A061935 * A061937 A061938 A061939 KEYWORD nonn,base,more AUTHOR Larry Reeves (larryr(AT)acm.org), May 24 2001 EXTENSIONS Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002; Aug 25 2002 a(23)-a(26) from Lars Blomberg, Oct 17 2011 STATUS approved

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Last modified July 25 09:18 EDT 2021. Contains 346286 sequences. (Running on oeis4.)