Primes that remain prime through 5 iterations of function f(x) = 4x + 9.

Terms

a(0) =18257a(1) =19541a(2) =22063a(3) =48383a(4) =73037a(5) =73133a(6) =78173a(7) =88261a(8) =93811a(9) =101051a(10) =104537a(11) =152377a(12) =153941a(13) =162343a(14) =168043a(15) =175523a(16) =204251a(17) =211681a(18) =238463a(19) =287341a(20) =375253a(21) =386713a(22) =423961a(23) =659513a(24) =672181a(25) =676103a(26) =688027a(27) =741283a(28) =759491a(29) =770951