|
|
A061938
|
|
Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 9 (most significant digit on right).
|
|
1
|
|
|
1, 3, 13, 32, 179, 4543, 5585, 11248, 16775, 29600, 56560, 444473, 4158800
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
This sequence differs from A029502 in that all least significant zeros are removed before concatenation.
|
|
LINKS
|
|
|
EXAMPLE
|
|
|
MATHEMATICA
|
b = 9; 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=9) = 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
|
|
|
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
|
|
STATUS
|
approved
|
|
|
|