Primes that remain prime through 2 iterations of function f(x) = 8x + 9.

Terms

a(0) =23a(1) =43a(2) =83a(3) =109a(4) =193a(5) =379a(6) =389a(7) =569a(8) =643a(9) =659a(10) =853a(11) =1063a(12) =1129a(13) =1283a(14) =1423a(15) =1493a(16) =1759a(17) =1789a(18) =1889a(19) =2003a(20) =2129a(21) =2293a(22) =2459a(23) =2713a(24) =2729a(25) =2879a(26) =2969a(27) =3373a(28) =3823a(29) =4519