login
A279689
Numbers n such that n and 2n are anagrams in more than one base.
3
0, 40, 96, 104, 208, 248, 258, 288, 312, 480, 752, 833, 936, 960, 968, 1170, 1248, 1728, 1755, 2090, 2232, 2400, 2608, 2768, 2808, 2832, 2904, 4224, 4464, 5208, 5280, 5418, 6075, 6584, 6696, 6714, 6720, 6768, 6800, 6966, 7020, 7182, 7200, 7714, 7728, 7776
OFFSET
1,2
EXAMPLE
a(2) = 40 because 40 and 80 are anagrams in bases 5 and 11.
a(13) = 936 because 936 and 1872 are anagrams in bases 3, 9, and 53.
PROG
(PARI) isok(n) = (n==0) || sum(b=2, n, vecsort(digits(n, b)) == vecsort(digits(2*n, b))) > 1; \\ Michel Marcus, Dec 17 2016
CROSSREFS
Cf. A279688.
Sequence in context: A036194 A023695 A038466 * A063310 A211493 A185791
KEYWORD
nonn,base
AUTHOR
Peter Kagey, Dec 17 2016
STATUS
approved