A260053 Composites whose prime factorization in base 9 is an anagram of the number in base 9.

72646, 74176, 75295, 78475, 134832, 189771, 255619, 422233, 440561, 586022, 638582, 644799, 655312, 659712, 701078, 855296, 882278, 919488, 1197500, 1213750, 1328102, 1329280, 1428352, 1451968, 1581088, 1585184, 1718857

Offset

1,1

Links

Giovanni Resta, Table of n, a(n) for n = 1..10000

Example

72646 = 2 * 7 * 5189. In base 9, 120577 = 2 * 7 * 7105.

Mathematica

Select[Range[10^6], !PrimeQ[#] && Sort@ IntegerDigits[#, 9] == Sort@ Flatten@ IntegerDigits[ Select[ Flatten@ FactorInteger@ #, #>1 &], 9] &] (* Giovanni Resta, Jul 14 2015 *)

Crossrefs

Cf. A260046, A260047, A260048, A260049, A260050, A260051, A260052, A025283, A260054, A260055.

Sequence in context: A114258 A238151 A234243 * A237555 A186047 A252333

Adjacent sequences: A260050 A260051 A260052 * A260054 A260055 A260056

Keyword

base,easy,nonn

Author

Stephen Tucker, Jul 14 2015

Status

approved