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A260048 Composites whose prime factorization in base 4 is an anagram of the number in base 4. 11
25, 637, 722, 1135, 1243, 1519, 1639, 1734, 1863, 2167, 4735, 4855, 4939, 5311, 5746, 5886, 5967, 6381, 6589, 6713, 7003, 7339, 7407, 7774, 8154, 8503, 8667, 8703, 9457, 11123, 11221, 11711, 15471, 16735, 17779, 17965, 18079, 18283, 18477, 18589 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

EXAMPLE

25 = 5^2. In base 4, 121 = 11^2.

MATHEMATICA

Select[Range[10^6], !PrimeQ[#] && Sort@ IntegerDigits[#, 4] == Sort@ Flatten@ IntegerDigits[ Select[ Flatten@ FactorInteger@ #, #>1 &], 4] &] (* Giovanni Resta, Jul 14 2015 *)

CROSSREFS

Cf. A260046, A260047, A260049, A260050, A260051, A260052, A260053, A025283, A260054, A260055.

Sequence in context: A009969 A042202 A203341 * A152256 A153111 A097194

Adjacent sequences:  A260045 A260046 A260047 * A260049 A260050 A260051

KEYWORD

base,easy,nonn

AUTHOR

Stephen Tucker, Jul 14 2015

STATUS

approved

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Last modified March 2 12:26 EST 2021. Contains 341750 sequences. (Running on oeis4.)