1,1

a(3) = 97: y = x^2+15x+97.

If x = 0; y = 0+0+97 = 97, which is prime.

If x = 1; y = 1+15+97 = 113, which is prime.

If x = 2; y = 4+30+97 = 131, which is prime.

If x = 3; y = 9+45+97 = 151, which is prime.

If x = 4; y = 16+60+97 = 173, which is prime.

If x = 5; y = 25+75+97 = 197, which is prime.

If x = 6; y = 36+90+97 = 223, which is prime.

If x = 7; y = 49+105+97 = 251, which is prime.

If x = 8; y = 64+120+97 = 281, which is prime.

Sequence in context: A107141 A139849 A139911 this_sequence A138353 A097402 A139873

Adjacent sequences: A097457 A097458 A097459 this_sequence A097461 A097462 A097463

nonn

Ray G. Opao (1260(AT)email.com), Aug 23 2004