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A302123
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Numbers k such that 6*k^k - 5 is prime.
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6
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2, 3, 4, 7, 8, 9, 33, 138, 251, 467, 489, 9894
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OFFSET
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1,1
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COMMENTS
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LINKS
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MATHEMATICA
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PROG
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(PARI) for(n=0, 300, if(isprime(6*n^n-5), print1(n", ")))
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CROSSREFS
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Numbers k such that b*k^k - b + 1 is prime: A301521 (b=4), this sequence (b=6).
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KEYWORD
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nonn,more,hard
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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