A260049 - OEIS

A260049

Composites whose prime factorization in base 5 is an anagram of the number in base 5.

2312, 2432, 3232, 5319, 5373, 10112, 10719, 11691, 14592, 15417, 19712, 20412, 21688, 22194, 23841, 24705, 25920, 26217, 32724, 36096, 39168, 41823, 42194, 42417, 43713, 51597, 58029, 59211, 61557, 62192, 66944, 67068, 68553, 72873, 76464

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

OFFSET

1,1

LINKS

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

EXAMPLE

2312 = 2^3 * 17^2. In base 5, 33222 = 2^3 * 32^2.

MATHEMATICA

Select[Range[10^5], !PrimeQ[#] && Sort@ IntegerDigits[#, 5] == Sort@ Flatten@ IntegerDigits[ Select[ Flatten@ FactorInteger@ #, #>1 &], 5] &] (* Giovanni Resta, Jul 14 2015 *)

CROSSREFS

Cf. A260046, A260047, A260048, A260050, A260051, A260052, A260053, A025283, A260054, A260055.

Sequence in context: A020435 A288798 A035893 * A184025 A251436 A035771

Adjacent sequences: A260046 A260047 A260048 * A260050 A260051 A260052

KEYWORD

base,easy,nonn

AUTHOR

Stephen Tucker, Jul 14 2015

STATUS

approved