A059808 Numbers which contain the same digits in two different bases.

7, 9, 11, 13, 15, 16, 17, 19, 21, 22, 23, 25, 26, 27, 28, 29, 30, 31, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87

Offset: 1

Author

Erich Friedman, Feb 24 2001

Keywords

• base
• nonn

Examples

			13 can be written as 12 (in base 11) or 21 (in base 6)
		

Crossrefs

Cf. A059809.

Programs

PARI

isok(n) = {for (b=3, n, db = vecsort(digits(n, b)); for (c = 2, b-1, dc = vecsort(digits(n, c)); if (dc == db, return (1));););} \\ Michel Marcus, Aug 03 2015