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A196273
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Primes of the form n*2^(n-1)+1.
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2
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2, 5, 13, 193, 449, 114689, 1811939329, 2434970217729660813313, 4943727411754159833089, 6731298963614255244763987969, 2388456554926020709124028311441244161
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OFFSET
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1,1
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COMMENTS
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Generated by n = 1, 2, 3, 6, 7, 14, 27, 66, 67, 87, 115, .. = A029544(n)+1.
See also A236752 for primes of the form k*2^(k-1) - 1, and A230769 for the corresponding indices k (minus 1). - M. F. Hasler, Mar 01 2014
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LINKS
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MATHEMATICA
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Select[Table[n*2^(n-1)+1, {n, 150}], PrimeQ] (* Harvey P. Dale, Jul 17 2018 *)
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PROG
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(PARI) lista(nn) = {for (n=1, nn, if (isprime(p = n*2^(n-1)+1), print1(p, ", ")); ); } \\ Michel Marcus, Nov 09 2013
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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