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A260048
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Composites whose prime factorization in base 4 is an anagram of the number in base 4.
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11
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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
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listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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EXAMPLE
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25 = 5^2. In base 4, 121 = 11^2.
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MATHEMATICA
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Select[Range[10^6], !PrimeQ[#] && Sort@ IntegerDigits[#, 4] == Sort@ Flatten@ IntegerDigits[ Select[ Flatten@ FactorInteger@ #, #>1 &], 4] &] (* Giovanni Resta, Jul 14 2015 *)
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CROSSREFS
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KEYWORD
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base,easy,nonn
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AUTHOR
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STATUS
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approved
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