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A195815
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Numbers k such that 2*(3^k-2*k)+1 is prime.
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0
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1, 2, 3, 5, 11, 188, 509, 1730, 2571, 3402, 4407, 9890, 18609, 20456, 32529, 38124
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OFFSET
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1,2
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COMMENTS
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The associated primes are 3, 11, 43, 467, 354251,....
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LINKS
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EXAMPLE
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a(1)=1 because 2*(3^1-2*1)+1=3 is a prime, a(2)=2 because 2*(3^2-2*2)+1=11 is a prime, a(3)=3 because 2*(3^3-2*3)+1=43 is a prime, a(4)=5 because 2*(3^5-2*5)+1=467 is a prime, a(5)=11 because 2*(3^11-2*11)+1=354251 is a prime.
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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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EXTENSIONS
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STATUS
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approved
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