Primes p such that both p-2 and 2p-1 are prime.

Terms

a(0) =7a(1) =19a(2) =31a(3) =139a(4) =199a(5) =229a(6) =271a(7) =601a(8) =619a(9) =661a(10) =811a(11) =829a(12) =1279a(13) =1429a(14) =1609a(15) =2029a(16) =2089a(17) =2131a(18) =2311a(19) =2551a(20) =2791a(21) =3169a(22) =3331a(23) =3391a(24) =3529a(25) =3769a(26) =4051a(27) =4159a(28) =4231a(29) =4261