Primes that remain prime through 5 iterations of function f(x) = 7x + 6.

Terms

a(0) =4259a(1) =174079a(2) =253369a(3) =275699a(4) =448859a(5) =527159a(6) =539639a(7) =649969a(8) =1101509a(9) =1218559a(10) =1230629a(11) =1319729a(12) =1426889a(13) =1780939a(14) =1929899a(15) =1947109a(16) =1960919a(17) =2082469a(18) =2087419a(19) =2262409a(20) =2479619a(21) =2499169a(22) =2797999a(23) =2808359a(24) =2809439a(25) =2813339a(26) =3089059a(27) =3363749