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Search: id:A073499
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| A073499 |
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Numbers n such that n^(n+1) + (n+1)^n is prime. |
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+0
5
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OFFSET
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1,2
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COMMENT
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There are no more terms up to 1650.
6964 and 9376 are terms. - Alexander Adamchuk (alex(AT)kolmogorov.com), Apr 09 2007
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EXAMPLE
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1^2 + 2^1 = 3 and 2^3 + 3^2 = 17 are the primes corresponding to the first two terms. The next four terms correspond to probable primes of 155, 870, 2487, and 3678 decimal digits.
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MATHEMATICA
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Do[ If[ PrimeQ[n^(n + 1) + (n + 1)^n], Print[n]], {n, 1, 1650}]
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PROGRAM
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(PARI) for(n=1, 1650, if(isprime((n^(n+1))+((n+1)^n)), print1(n, ", ")))
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CROSSREFS
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Cf. A072179.
Sequence in context: A113152 A060051 A100421 this_sequence A123828 A008563 A059487
Adjacent sequences: A073496 A073497 A073498 this_sequence A073500 A073501 A073502
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KEYWORD
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nonn
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AUTHOR
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Rick L. Shepherd (rshepherd2(AT)hotmail.com), Aug 05 2002
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EXTENSIONS
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Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 08 2002
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