A059808 - OEIS

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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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..70.

EXAMPLE

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

PROG

(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

CROSSREFS

Cf. A059809.

Sequence in context: A004169 A295299 A066669 * A020742 A193071 A329112

Adjacent sequences: A059805 A059806 A059807 * A059809 A059810 A059811

KEYWORD

base,nonn

AUTHOR

Erich Friedman, Feb 24 2001

STATUS

approved