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

Terms

a(0) =5333a(1) =26669a(2) =294167a(3) =324869a(4) =344189a(5) =578297a(6) =676829a(7) =807407a(8) =894893a(9) =1078559a(10) =1114427a(11) =1174487a(12) =1624349a(13) =1883363a(14) =2247923a(15) =2926769a(16) =3075029a(17) =3196871a(18) =3427871a(19) =3558407a(20) =4037039a(21) =4205879a(22) =5392799a(23) =6130823a(24) =6479423a(25) =6714497a(26) =6750113a(27) =6915299