Primes of the form 6m + 1.

Terms

a(0) =7a(1) =13a(2) =19a(3) =31a(4) =37a(5) =43a(6) =61a(7) =67a(8) =73a(9) =79a(10) =97a(11) =103a(12) =109a(13) =127a(14) =139a(15) =151a(16) =157a(17) =163a(18) =181a(19) =193a(20) =199a(21) =211a(22) =223a(23) =229a(24) =241a(25) =271a(26) =277a(27) =283a(28) =307a(29) =313