Primes that remain prime through 2 iterations of function f(x) = 8x + 7.

Terms

a(0) =2a(1) =5a(2) =107a(3) =137a(4) =179a(5) =197a(6) =227a(7) =359a(8) =419a(9) =617a(10) =659a(11) =839a(12) =977a(13) =1097a(14) =1217a(15) =1409a(16) =1487a(17) =1559a(18) =1637a(19) =2087a(20) =2339a(21) =2447a(22) =2549a(23) =2609a(24) =2687a(25) =2909a(26) =2957a(27) =3167a(28) =3299a(29) =3467