Primes that remain prime through 4 iterations of function f(x) = 6x + 5.

Terms

a(0) =11a(1) =13a(2) =83a(3) =151a(4) =317a(5) =373a(6) =1721a(7) =3529a(8) =4153a(9) =4243a(10) =4637a(11) =4783a(12) =5209a(13) =5849a(14) =5923a(15) =6661a(16) =8431a(17) =10903a(18) =11329a(19) =14519a(20) =16183a(21) =16979a(22) =20149a(23) =26669a(24) =27509a(25) =27827a(26) =29873a(27) =29947a(28) =32987a(29) =33637