Primes that remain prime through 3 iterations of function f(x) = 6x + 5.

Terms

a(0) =2a(1) =11a(2) =13a(3) =31a(4) =71a(5) =83a(6) =151a(7) =163a(8) =193a(9) =197a(10) =317a(11) =347a(12) =373a(13) =503a(14) =577a(15) =811a(16) =911a(17) =919a(18) =1049a(19) =1051a(20) =1201a(21) =1423a(22) =1721a(23) =1907a(24) =2089a(25) =2243a(26) =2543a(27) =2719a(28) =2963a(29) =3529