Primes p such that pi(p) is not prime.

Terms

a(0) =2a(1) =7a(2) =13a(3) =19a(4) =23a(5) =29a(6) =37a(7) =43a(8) =47a(9) =53a(10) =61a(11) =71a(12) =73a(13) =79a(14) =89a(15) =97a(16) =101a(17) =103a(18) =107a(19) =113a(20) =131a(21) =137a(22) =139a(23) =149a(24) =151a(25) =163a(26) =167a(27) =173a(28) =181a(29) =193