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Search: id:A140669
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| A140669 |
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Numbers n such that (n+1)^(n+1) - n^n is prime. |
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+0
2
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OFFSET
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1,2
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COMMENT
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Terms found with PrimeForm. Primes corresponding to 16, 105, and 119 certified with Primo. 7917 corresponds to a 30870-digit probable prime.
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EXAMPLE
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17^17 - 16^16 = 808793517812627212561, which is prime, so 16 is a term.
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CROSSREFS
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Cf. A134985. Equals A072164 - 1.
Sequence in context: A034419 A066895 A105075 this_sequence A001636 A036588 A099517
Adjacent sequences: A140666 A140667 A140668 this_sequence A140670 A140671 A140672
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KEYWORD
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hard,nonn
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AUTHOR
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Rick L. Shepherd (rshepherd2(AT)hotmail.com), May 21 2008
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