A253605 Primes p such that the polynomial x^2 + x + p generates only primes for x=1..13.

17, 41, 27649987598537, 30431463129071

Offset

1,1

Links

Table of n, a(n) for n=1..4.

Prog

(PARI) isok(p) = {for (n=1, 13, if (! isprime(subst(x^2+x+p, x, n)), return (0)); ); 1; } \\ Michel Marcus, Jan 13 2015

Crossrefs

Subsequence of A253592 and A191458. Cf. A164926.

Sequence in context: A191457 A191458 A253592 * A044094 A044475 A024188

Adjacent sequences: A253602 A253603 A253604 * A253606 A253607 A253608

Keyword

nonn,more

Author

Zak Seidov, Jan 05 2015

Status

approved