Primes that remain prime through 4 iterations of function f(x) = 9x + 2.

Terms

a(0) =103a(1) =283a(2) =313a(3) =929a(4) =2549a(5) =2593a(6) =3931a(7) =4091a(8) =5279a(9) =6781a(10) =7759a(11) =8363a(12) =16229a(13) =16493a(14) =16703a(15) =19961a(16) =24071a(17) =25733a(18) =27059a(19) =32191a(20) =34961a(21) =35381a(22) =36341a(23) =44131a(24) =50093a(25) =52973a(26) =59671a(27) =66179a(28) =69833a(29) =69931