Primes which remain prime through 5 iterations of function f(x) = 8x + 1.

Terms

a(0) =831167a(1) =1154567a(2) =2502767a(3) =3019787a(4) =3675197a(5) =5056577a(6) =6352487a(7) =14519177a(8) =26724377a(9) =43003577a(10) =47378927a(11) =47695607a(12) =56406197a(13) =86332457a(14) =86611757a(15) =99568757a(16) =121967987a(17) =126435527a(18) =127990997a(19) =128149127a(20) =128975057a(21) =145281557a(22) =155715407