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A271883
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Numbers n such that 9^n-8^(n-1) is prime.
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10
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OFFSET
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1,1
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COMMENTS
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a(6) > 10^5.
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LINKS
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EXAMPLE
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2 is a member since 9^2 - 8^1 = 81 - 8 = 73 which is a prime number.
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MATHEMATICA
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Select[Range[0, 100000], PrimeQ[9^# - 8^(# - 1)] &]
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PROG
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(PARI) lista(nn) = for(n=1, nn, if(ispseudoprime(9^n-8^(n-1)), print1(n, ", "))); \\ Altug Alkan, Apr 16 2016
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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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