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A217130
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Numbers n such that 7^n + 6 is prime.
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10
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0, 1, 3, 16, 36, 244, 315, 2577, 9500, 17596, 25551, 32193, 32835, 36504, 75136
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OFFSET
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1,3
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COMMENTS
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LINKS
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MATHEMATICA
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Select[Range[0, 5000], PrimeQ[7^# + 6] &]
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PROG
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(PARI) for(n=1, 5000, if(isprime(7^n+6), print1(n", ")))
(Magma) /* The code produces the sequence up to 315: */ [n: n in [0..2000] | IsPrime(7^n+6)];
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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