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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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified February 7 01:12 EST 2016. Contains 268050 sequences.