Primes that remain prime through 4 iterations of function f(x) = 4x + 3.

Terms

a(0) =1447a(1) =2207a(2) =6211a(3) =6607a(4) =8369a(5) =9769a(6) =11821a(7) =13537a(8) =13729a(9) =13781a(10) =15581a(11) =17231a(12) =17497a(13) =27817a(14) =32059a(15) =32569a(16) =32611a(17) =33647a(18) =36251a(19) =39079a(20) =46381a(21) =47417a(22) =55127a(23) =55171a(24) =57077a(25) =60869a(26) =63361a(27) =64327a(28) =68927a(29) =77951