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%I A087575 #6 Dec 05 2013 19:56:31
%S A087575 3,3,3,3,11,0,53,3,11,3,23,0,71,3,3,0,5,0,521,0,1847,0,41,3,71,3,59,0,
%T A087575 191,0,71,0,827,0,761,3,1721,0,23,0,197,0,1229,0,59,0,1493,0,101,0,
%U A087575 389,0,2381,0,3023,0,4691,0,6263,0,9719,0,3,0,2207,0,983,0,6701,0,239,0,347
%N A087575 Smallest prime p such that 2+p^n is a prime, or 0 if no such prime exists.
%e A087575 a(2)=a(3)=a(4)=3, as 3^2 + 2, 3^3 + 2, 3^4 + 2 are all prime.
%o A087575 (PARI) for(j=1,50, forprime (i=1,50000,if(isprime(i^j+2),print1(i,",");break())))
%K A087575 nonn
%O A087575 1,1
%A A087575 _Amarnath Murthy_, Sep 17 2003
%E A087575 More terms from Mohammed Bouayoun (bouyao(AT)wanadoo.fr), Mar 14 2004
%E A087575 More terms from _David Wasserman_, Jun 08 2005

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