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A066846
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Numbers of the form a^a + b^b, a >= b > 0.
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3
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2, 5, 8, 28, 31, 54, 257, 260, 283, 512, 3126, 3129, 3152, 3381, 6250, 46657, 46660, 46683, 46912, 49781, 93312, 823544, 823547, 823570, 823799, 826668, 870199, 1647086, 16777217, 16777220, 16777243, 16777472, 16780341, 16823872, 17600759, 33554432
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OFFSET
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0,1
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LINKS
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EXAMPLE
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28 is included because 28 = 1^1 + 3^3.
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MATHEMATICA
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nn = 10; Select[Union[Flatten[Table[a^a + b^b, {a, nn}, {b, a, nn}]]], # <= nn^nn + 1 &] (* T. D. Noe, Nov 15 2012 *)
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CROSSREFS
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Cf. A068145: primes of the form a^a + b^b.
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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Name improved by Alex Ratushnyak, Oct 26 2012
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STATUS
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approved
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