Primes p that remain prime through at least 3 iterations of function f(p)=p^2+4.

Terms

a(0) =5087a(1) =11173a(2) =16657a(3) =47017a(4) =54503a(5) =185243a(6) =207643a(7) =300413a(8) =306167a(9) =341813a(10) =391387a(11) =849047a(12) =1348577a(13) =1438223a(14) =1502923a(15) =1857407a(16) =1909267a(17) =2121737a(18) =2161163a(19) =2288773a(20) =2610133a(21) =2725157a(22) =2744723a(23) =2779097a(24) =2874463a(25) =2881327a(26) =3079927a(27) =3149077a(28) =3154483a(29) =3173683