Primes such that next prime is 4 greater.

Terms

a(0) =7a(1) =13a(2) =19a(3) =37a(4) =43a(5) =67a(6) =79a(7) =97a(8) =103a(9) =109a(10) =127a(11) =163a(12) =193a(13) =223a(14) =229a(15) =277a(16) =307a(17) =313a(18) =349a(19) =379a(20) =397a(21) =439a(22) =457a(23) =463a(24) =487a(25) =499a(26) =613a(27) =643a(28) =673a(29) =739