Primes that remain prime through 2 iterations of function f(x) = 9x + 10.

Terms

a(0) =11a(1) =13a(2) =43a(3) =47a(4) =67a(5) =83a(6) =89a(7) =103a(8) =109a(9) =193a(10) =197a(11) =251a(12) =281a(13) =293a(14) =383a(15) =397a(16) =449a(17) =461a(18) =601a(19) =617a(20) =641a(21) =733a(22) =757a(23) =823a(24) =839a(25) =853a(26) =887a(27) =937a(28) =967a(29) =1013