Primes p that remain prime through at least 2 iterations of the function f(p) = p^2 + 4.

Terms

a(0) =3a(1) =17a(2) =103a(3) =137a(4) =277a(5) =313a(6) =677a(7) =743a(8) =1117a(9) =1627a(10) =2003a(11) =2143a(12) =3407a(13) =3677a(14) =4483a(15) =5087a(16) =5903a(17) =7177a(18) =7333a(19) =8087a(20) =8093a(21) =8147a(22) =8537a(23) =8573a(24) =9293a(25) =9473a(26) =10177a(27) =10477a(28) =11173a(29) =13807