Primes that remain prime through 2 iterations of function f(x) = 10x + 3.

Terms

a(0) =2a(1) =7a(2) =17a(3) =19a(4) =23a(5) =37a(6) =61a(7) =67a(8) =73a(9) =101a(10) =103a(11) =173a(12) =193a(13) =233a(14) =359a(15) =383a(16) =409a(17) =479a(18) =541a(19) =557a(20) =607a(21) =613a(22) =719a(23) =809a(24) =857a(25) =997a(26) =1013a(27) =1033a(28) =1109a(29) =1117