A061946 Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 17 (most significant digit on right).
1, 53, 64, 192, 535, 1017, 1888, 23968, 203008, 9231277
Offset: 1
Examples
See A061931 for example.
Crossrefs
Programs
-
Mathematica
b = 17; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[c, IntegerDigits[IntegerReverse[#, b], b]], b], #] &] (* Robert Price, Mar 08 2020 *) -
PARI
lista(nn) = my(s, t); for(k=1, nn, s=k/17^valuation(k, 17); while(s, t=t*17+s%17; s\=17); if(t%k==0, print1(k, ", "))); \\ Jinyuan Wang, Dec 05 2020
Extensions
Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002
a(10) from Lars Blomberg, Oct 22 2011
Comments