Primes p such that 4*p+1 is also prime.

Terms

a(0) =3a(1) =7a(2) =13a(3) =37a(4) =43a(5) =67a(6) =73a(7) =79a(8) =97a(9) =127a(10) =139a(11) =163a(12) =193a(13) =199a(14) =277a(15) =307a(16) =373a(17) =409a(18) =433a(19) =487a(20) =499a(21) =577a(22) =619a(23) =673a(24) =709a(25) =727a(26) =739a(27) =853a(28) =883a(29) =919