Numbers n such that (2^p + 1)/3 is prime, where p is the n-th prime.

Terms

a(0) =2a(1) =3a(2) =4a(3) =5a(4) =6a(5) =7a(6) =8a(7) =9a(8) =11a(9) =14a(10) =18a(11) =22a(12) =26a(13) =31a(14) =39a(15) =43a(16) =46a(17) =65a(18) =69a(19) =126a(20) =267a(21) =380a(22) =495a(23) =762a(24) =1285a(25) =1304a(26) =1364a(27) =1479a(28) =1697a(29) =4469