A279689 Numbers n such that n and 2n are anagrams in more than one base.

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

Links

Chai Wah Wu, Table of n, a(n) for n = 1..1001

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

Adjacent sequences: A279686 A279687 A279688 * A279690 A279691 A279692

Keyword

nonn,base

Author

Peter Kagey, Dec 17 2016

Status

approved