Primes having only {3, 4, 6, 9} as digits.

Terms

a(0) =3a(1) =43a(2) =349a(3) =433a(4) =439a(5) =443a(6) =449a(7) =463a(8) =499a(9) =643a(10) =3343a(11) =3433a(12) =3449a(13) =3463a(14) =3469a(15) =3499a(16) =3643a(17) =3943a(18) =4339a(19) =4349a(20) =4363a(21) =4463a(22) =4493a(23) =4639a(24) =4643a(25) =4649a(26) =4663a(27) =4933a(28) =4943a(29) =4969