A061975 Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 22 (most significant digit on right).
1, 3, 7, 9, 21, 31, 63, 751, 1743, 2205, 12345, 16689, 20111, 26607, 32247, 119595, 437829, 2834567
Offset: 1
Examples
See A061955 for example.
Crossrefs
Programs
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Mathematica
b = 22; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[Reverse[IntegerDigits[#, b]], c], b], #] &] (* Robert Price, Mar 09 2020 *) -
PARI
lista(nn, m=22) = my(c, t); for(k=1, nn, t+=m^c*fromdigits(Vecrev(digits(k, m)), m); c+=logint(m*k, m); 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(17)-a(18) from Lars Blomberg, Jul 25 2011
Comments