Primes p such that 7*p + 4 is also prime.

Terms

a(0) =7a(1) =19a(2) =37a(3) =61a(4) =79a(5) =97a(6) =139a(7) =151a(8) =157a(9) =211a(10) =229a(11) =271a(12) =307a(13) =349a(14) =379a(15) =457a(16) =487a(17) =547a(18) =571a(19) =601a(20) =607a(21) =619a(22) =631a(23) =709a(24) =751a(25) =757a(26) =769a(27) =829a(28) =877a(29) =907