Primes of the form 8n+7, that is, primes congruent to -1 mod 8.

Terms

a(0) =7a(1) =23a(2) =31a(3) =47a(4) =71a(5) =79a(6) =103a(7) =127a(8) =151a(9) =167a(10) =191a(11) =199a(12) =223a(13) =239a(14) =263a(15) =271a(16) =311a(17) =359a(18) =367a(19) =383a(20) =431a(21) =439a(22) =463a(23) =479a(24) =487a(25) =503a(26) =599a(27) =607a(28) =631a(29) =647