Primes that remain prime through 4 iterations of function f(x) = 5x + 2.

Terms

a(0) =373a(1) =1171a(2) =13687a(3) =21997a(4) =25657a(5) =61603a(6) =74413a(7) =76471a(8) =84199a(9) =87181a(10) =93487a(11) =114691a(12) =135859a(13) =170761a(14) =174877a(15) =184333a(16) =192979a(17) =196177a(18) =207931a(19) =209743a(20) =244219a(21) =276229a(22) =286687a(23) =292561a(24) =297811a(25) =334603a(26) =338893a(27) =405037a(28) =408361a(29) =417097