Primes of the form 8*k^2 - 1.

Terms

a(0) =7a(1) =31a(2) =71a(3) =127a(4) =199a(5) =647a(6) =967a(7) =1151a(8) =1567a(9) =2311a(10) =2591a(11) =2887a(12) =3527a(13) =4231a(14) =4999a(15) =5407a(16) =6271a(17) =7687a(18) =8191a(19) =11551a(20) =12799a(21) =16927a(22) =19207a(23) =20807a(24) =23327a(25) =25087a(26) =27847a(27) =31751a(28) =34847a(29) =35911