This site is supported by donations to The OEIS Foundation.



Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A091514 Kynea primes: primes of the form (2^n+1)^2-2 = 4^n+2^(n+1)-1. 7


%S 2,7,23,79,1087,66047,263167,16785407,1073807359,17180131327,

%T 68720001023,4398050705407,70368760954879,18014398777917439,

%U 18446744082299486207,5070602400912922109586440191999

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

%H Vincenzo Librandi, <a href="/A091514/b091514.txt">Table of n, a(n) for n = 1..30</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/KyneaNumber.html">Kynea Number</a>

%t 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]

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

%Y Cf. A091513.

%K nonn

%O 1,1

%A _Eric W. Weisstein_, Jan 17, 2004

%E Edited by _Ray Chandler_, Nov 15, 2004

%E The first term 2 added by Vincenzo Librandi, Dec 13 2011

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified December 18 04:30 EST 2014. Contains 252079 sequences.