Primes that remain prime through 2 iterations of function f(x) = 3x + 8.

Terms

a(0) =3a(1) =11a(2) =13a(3) =31a(4) =41a(5) =43a(6) =53a(7) =101a(8) =113a(9) =211a(10) =223a(11) =263a(12) =283a(13) =431a(14) =433a(15) =491a(16) =521a(17) =563a(18) =571a(19) =601a(20) =631a(21) =641a(22) =673a(23) =743a(24) =811a(25) =911a(26) =1151a(27) =1361a(28) =1621a(29) =1693