A247276


Primes p such that p + m^2 is prime for all m in {2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26}.


0


%I #13 Sep 23 2014 22:55:14
%S 163,409333,13491637509487,19802478368863
%N Primes p such that p + m^2 is prime for all m in {2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26}.
%C All terms are == {7, 13} mod 30.
%C Subsequence of A247275.
%o (PARI)
%o forprime(p=1, 10^12, c=0; for(i=1, 13, if(ispseudoprime(p+(2*i)^2), c++);if(!ispseudoprime(p+(2*i)^2),break)); if(c==13, print1(p, ", "))) \\ _Derek Orr_, Sep 11 2014
%Y Cf. A049492, A092120, A246842, A247269, A145741, A247273, A247275.
%K nonn,hard,more
%O 1,1
%A _Zak Seidov_, Sep 11 2014
