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Search: id:A100408
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| A100408 |
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Numbers n such that n^n-2 is prime. |
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+0
5
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OFFSET
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1,1
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COMMENT
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Except for the first term all terms are odd.
Numbers n such that n^n+7 is prime gives the (as yet) too-short sequence 2,4,6,32,...
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EXAMPLE
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51 is in the sequence because 51^51-2 is prime. 1071^1071-2 is a probable prime.
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MATHEMATICA
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Do[If[PrimeQ[n^n-2], Print[n]], {n, 1111}]
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CROSSREFS
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Cf. A100407.
Sequence in context: A046866 A000988 A002214 this_sequence A140562 A140550 A103034
Adjacent sequences: A100405 A100406 A100407 this_sequence A100409 A100410 A100411
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KEYWORD
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more,nonn
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AUTHOR
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Farideh Firoozbakht (mymontain(AT)yahoo.com), Nov 19 2004
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