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A192764
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Numbers k such that 2^(k-1)+2*k-1 is a prime number.
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1
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1, 2, 6, 14, 66, 86, 230, 2006, 3876, 3920, 5418, 8820, 11900, 16669, 19446, 28243, 33408, 37919, 40595
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OFFSET
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1,2
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LINKS
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MATHEMATICA
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Select[Range[4000], PrimeQ[2^(# - 1) + 2# - 1] &] (* Alonso del Arte, Jul 09 2011 *)
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PROG
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(PARI) for(n=1, 10^6, if(ispseudoprime(2^(n-1)+2*n-1), print1(n, ", ")));
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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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