Class 2- primes (for definition see A005109).

Terms

a(0) =11a(1) =29a(2) =31a(3) =41a(4) =43a(5) =53a(6) =61a(7) =71a(8) =79a(9) =101a(10) =103a(11) =113a(12) =127a(13) =131a(14) =137a(15) =149a(16) =151a(17) =157a(18) =181a(19) =191a(20) =197a(21) =211a(22) =223a(23) =229a(24) =239a(25) =241a(26) =251a(27) =271a(28) =281a(29) =293