%I A006596 M1325
%S A006596 2,5,6,14,21,26,141,278,281,306,345,1365,2573,2661,4766,5385
%N A006596 Numbers n such that (2^{2n+1} - 2^{n+1} + 1)/5 is prime.
%D A006596 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A006596 J. Brillhart et al., Factorizations of b^n +- 1. Contemporary Mathematics, 
               Vol. 22, Amer. Math. Soc., Providence, RI, 2nd edition, 1985; and 
               later supplements.
%H A006596 S. S. Wagstaff, Jr., <a href="http://www.cerias.purdue.edu/homes/ssw/
               cun/index.html">The Cunningham Project</a>
%H A006596 J. Brillhart et al., <a href="http://www.ams.org/online_bks/conm22/">
               Factorizations of b^n +- 1</a>, Contemporary Mathematics, Vol. 22, 
               Amer. Math. Soc., Providence, RI, 3rd edition, 2002.
%t A006596 For[ i=1, i<=10000, i++, If[ PrimeQ[ ( 2^(2n+1) - 2^(n+1) + 1)/5 ], Print[ 
               n ] ] ]
%Y A006596 Sequence in context: A105043 A083095 A083097 this_sequence A000092 A100630 
               A057302
%Y A006596 Adjacent sequences: A006593 A006594 A006595 this_sequence A006597 A006598 
               A006599
%K A006596 nonn,hard
%O A006596 1,1
%A A006596 N. J. A. Sloane (njas(AT)research.att.com).
%E A006596 More terms from Douglas R. Burke (dburke(AT)nevada.edu)