

A091514


Kynea primes: primes of the form (2^n + 1)^2  2 = 4^n + 2^(n+1)  1.


7



2, 7, 23, 79, 1087, 66047, 263167, 16785407, 1073807359, 17180131327, 68720001023, 4398050705407, 70368760954879, 18014398777917439, 18446744082299486207, 5070602400912922109586440191999
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OFFSET

1,1


LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..30
Eric Weisstein's World of Mathematics, Kynea Number


MATHEMATICA

lst={}; Do[If[PrimeQ[p=4^n+2^(n+1)1], (*Print[p]; *)AppendTo[lst, p]], {n, 10^2}]; lst (* Vladimir Joseph Stephan Orlovsky, Aug 21 2008 *)


PROG

(MAGMA) [a: n in [0..60]  IsPrime(a) where a is 4^n+2^(n+1)1]; // Vincenzo Librandi, Dec 13 2011


CROSSREFS

Cf. A091513.
Sequence in context: A112657 A007717 A130567 * A143629 A176287 A119371
Adjacent sequences: A091511 A091512 A091513 * A091515 A091516 A091517


KEYWORD

nonn


AUTHOR

Eric W. Weisstein, Jan 17 2004


EXTENSIONS

Edited by Ray Chandler, Nov 15 2004
First term (2) added by Vincenzo Librandi, Dec 13 2011


STATUS

approved



