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A191409
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Primes of the form n*(n-1)^n-(n-1)*n^(n-1)-1.
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2
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OFFSET
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1,1
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COMMENTS
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a(6) and a(7) have 427 and 1773 digits, respectively, and are thus too large to include.
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LINKS
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Table of n, a(n) for n=1..5.
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EXAMPLE
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a(1)=5 (=3*2^3-2*3^2-1), a(2)=131 (=4*3^4-3*4^3-1), a(3)=54869 (=6*5^6-5*6^5-1), a(4)=863585783 (=9*8^9-8*9^8-1).
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MATHEMATICA
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Select[Table[n(n-1)^n-(n-1)n^(n-1)-1, {n, 200}], PrimeQ] (* Harvey P. Dale, Jun 19 2011 *)
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CROSSREFS
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Cf. A191699 (associated n).
Sequence in context: A222880 A070247 A171375 * A003372 A187357 A135758
Adjacent sequences: A191406 A191407 A191408 * A191410 A191411 A191412
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KEYWORD
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nonn
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AUTHOR
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Juri-Stepan Gerasimov, Jun 12 2011
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STATUS
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approved
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