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

Terms

a(0) =883a(1) =2857a(2) =4073a(3) =4663a(4) =9311a(5) =11131a(6) =16493a(7) =18257a(8) =19541a(9) =22063a(10) =28687a(11) =35837a(12) =48383a(13) =55817a(14) =59393a(15) =62131a(16) =71387a(17) =73037a(18) =73133a(19) =78173a(20) =83423a(21) =86111a(22) =88261a(23) =90511a(24) =93287a(25) =93811a(26) =99377a(27) =101051a(28) =104537a(29) =122203