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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

Table of n, a(n) for n=1..27.

Index entries for related sequences

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

Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978.

Sequence in context: A109340 A024385 A212566 * A174440 A244475 A212870

Adjacent sequences:  A061939 A061940 A061941 * A061943 A061944 A061945

KEYWORD

nonn,base,more,changed

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 December 5 17:57 EST 2020. Contains 338962 sequences. (Running on oeis4.)