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A200816
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Numbers k such that (2^k - k)*2^k + 1 is prime.
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7
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1, 3, 4, 10, 11, 16, 47, 57, 69, 166, 327, 460, 1108, 4740, 20760, 21143, 27779, 34293, 34311
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OFFSET
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1,2
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COMMENTS
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The generalization of this sequence is possible with the primes of the form (b^n +- k)*b^n +- 1.
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LINKS
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EXAMPLE
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4 is in the sequence because (2^4 - 4)*2^4 + 1 = 193 is prime.
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MATHEMATICA
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lst={}; Do[If[PrimeQ[(2^n - n)*2^n+1], AppendTo[lst, n]], {n, 10^3}]; lst
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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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