Primes that remain prime through 2 iterations of the function f(x) = 2x + 5.

Terms

a(0) =7a(1) =13a(2) =31a(3) =37a(4) =67a(5) =73a(6) =79a(7) =139a(8) =151a(9) =181a(10) =367a(11) =541a(12) =613a(13) =661a(14) =709a(15) =739a(16) =787a(17) =811a(18) =829a(19) =997a(20) =1087a(21) =1117a(22) =1123a(23) =1249a(24) =1327a(25) =1669a(26) =1753a(27) =1801a(28) =1861a(29) =1999