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%I #8 May 09 2013 22:43:54
%S 22155,1864149,2760681,6222765,22687797,25631319,29309589,33333069,
%T 36490905,56310891,60212889,74097849,76008207,80864685,84214395,
%U 132006225,132621171,137362521,138993381,152223885,154185525,175950081,188261481,188677335,194279955
%N Numbers b such that b^(2^n) + 2 is prime for n from 0 to 4.
%C Generalized Fermat numbers of the form b^(2^n) + k with k = 2 here.
%C For b = 2760681, b^(2^n) + 2 is prime for n from 0 to 5
%o (PARI) k=2;forstep(b=1,5*10^7,[4,2,2,2],i=0;for(n=0,4,m=b^2^n+k;if(isprime(m),i++;if(i>4,print([b,m,n,i])))))
%Y Cf. A070694, A225321
%K nonn
%O 1,1
%A _Robin Garcia_, May 06 2013
%E a(10)-a(25) from _Giovanni Resta_, May 06 2013