Primes that remain prime through 3 iterations of function f(x) = 5x + 4.

Terms

a(0) =83a(1) =263a(2) =1217a(3) =1319a(4) =1511a(5) =1721a(6) =1847a(7) =1907a(8) =2141a(9) =2531a(10) =4283a(11) =4673a(12) =5333a(13) =6089a(14) =6353a(15) =6983a(16) =7013a(17) =7151a(18) =7529a(19) =8543a(20) =10709a(21) =10973a(22) =11423a(23) =15077a(24) =15137a(25) =17387a(26) =17573a(27) =20129a(28) =20201a(29) =20411