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A260046 Composites whose prime factorization in base 2 is an anagram of the number in base 2. 11
25, 159, 175, 242, 245, 287, 303, 319, 459, 500, 575, 591, 623, 679, 687, 699, 735, 763, 1135, 1167, 1203, 1243, 1247, 1271, 1351, 1371, 1391, 1525, 1631, 1734, 1911, 2167, 2173, 2231, 2285, 2295, 2319, 2359, 2463, 2471, 2495, 2519, 2743, 2779, 2787, 2863, 2890 (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 2, 11001 = 101^10.

MATHEMATICA

Select[Range[10^6], !PrimeQ[#] && Sort@ IntegerDigits[#, 2] == Sort@ Flatten@ IntegerDigits[ Select[ Flatten@ FactorInteger@ #, #>1 &], 2] &] (* Giovanni Resta, Jul 14 2015 *)

CROSSREFS

Cf. A260047, A260048, A260049, A260050, A260051, A260052, A260053, A025283, A260054, A260055.

Sequence in context: A084073 A049523 A232000 * A316948 A139729 A317728

Adjacent sequences:  A260043 A260044 A260045 * A260047 A260048 A260049

KEYWORD

base,easy,nonn

AUTHOR

Stephen Tucker, Jul 14 2015

STATUS

approved

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Last modified April 20 08:38 EDT 2021. Contains 343125 sequences. (Running on oeis4.)