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A061942 Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 13 (most significant digit on right). 1
1, 3, 9, 16, 27, 33, 48, 81, 144, 320, 880, 1041, 2304, 2645, 8189, 15368, 29040, 77864, 80192, 95568, 551520, 783408, 1973640, 2162592, 2352811, 2433557, 7598977 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
This sequence differs from A029506 in that all least significant zeros are removed before concatenation.
No more terms < 10^7. - Lars Blomberg, Oct 20 2011
LINKS
EXAMPLE
See A061931 for example.
MATHEMATICA
b = 13; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[c, IntegerDigits[IntegerReverse[#, b], b]], b], #] &] (* Robert Price, Mar 08 2020 *)
PROG
(PARI) lista(nn, m=13) = 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
Sequence in context: A354258 A024385 A212566 * A174440 A244475 A212870
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(22)-a(27) from Lars Blomberg, Oct 20 2011
STATUS
approved

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Last modified March 29 05:16 EDT 2024. Contains 371264 sequences. (Running on oeis4.)