

A091514


Kynea primes: primes of the form (2^n+1)^22 = 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 [From 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
The first term 2 added by Vincenzo Librandi, Dec 13 2011


STATUS

approved



