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A260051
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Composites whose prime factorization in base 7 is an anagram of the number in base 7.
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11
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7136, 9056, 30057, 32076, 40256, 40678, 46400, 71125, 90334, 145152, 150027, 159975, 166281, 177315, 193227, 201057, 207681, 207843, 212000, 218080, 224192, 225195, 229407, 246777, 263031, 265184, 297027, 298144, 298208, 306624, 318096
(list;
graph;
refs;
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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Giovanni Resta, Table of n, a(n) for n = 1..10000
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EXAMPLE
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7136 = 2^5 * 223. In base 7, 26543 = 2^5 * 436.
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MATHEMATICA
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Select[Range[10^5], !PrimeQ[#] && Sort@ IntegerDigits[#, 7] == Sort@ Flatten@ IntegerDigits[ Select[ Flatten@ FactorInteger@ #, #>1 &], 7] &] (* Giovanni Resta, Jul 14 2015 *)
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CROSSREFS
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Cf. A260046, A260047, A260048, A260049, A260050, A260052, A260053, A025283, A260054, A260055.
Sequence in context: A269040 A325066 A100539 * A123292 A116180 A252303
Adjacent sequences: A260048 A260049 A260050 * A260052 A260053 A260054
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KEYWORD
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base,easy,nonn
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AUTHOR
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Stephen Tucker, Jul 14 2015
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STATUS
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approved
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