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A108318
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Numbers n such that (n+1)*n^n-1 is prime.
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3
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2, 3, 4, 5, 7, 11, 15, 26, 52, 116, 359, 1547, 2465
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OFFSET
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1,1
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LINKS
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EXAMPLE
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15 is in the sequence because (15+1)*15^15-1 = 16*15^15-1 = 7006302246093749999, which is prime.
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MATHEMATICA
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PROG
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(PARI) isok(n) = isprime((n+1)*n^n-1); \\ Michel Marcus, Oct 23 2014
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CROSSREFS
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KEYWORD
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more,nonn
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AUTHOR
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STATUS
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approved
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