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A217380
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Numbers n such that 8^n - 7 is prime.
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1
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OFFSET
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1,1
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COMMENTS
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All terms are equal to 1/3 of the multiples of 3 in A059609.
Naturally these numbers are odd since (9-1)^(2n)-7 is divisible by 3. - Bruno Berselli, Oct 04 2012
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LINKS
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MATHEMATICA
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Select[Range[4000], PrimeQ[8^# - 7] &]
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PROG
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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