Primes that remain prime through 2 iterations of function f(x) = x + 6.

Terms

a(0) =5a(1) =7a(2) =11a(3) =17a(4) =31a(5) =41a(6) =47a(7) =61a(8) =67a(9) =97a(10) =101a(11) =151a(12) =167a(13) =227a(14) =251a(15) =257a(16) =271a(17) =347a(18) =367a(19) =557a(20) =587a(21) =601a(22) =607a(23) =641a(24) =647a(25) =727a(26) =941a(27) =971a(28) =1091a(29) =1097