Primes having only {3, 4, 5, 6} as digits.

Terms

a(0) =3a(1) =5a(2) =43a(3) =53a(4) =353a(5) =433a(6) =443a(7) =463a(8) =563a(9) =643a(10) =653a(11) =3343a(12) =3433a(13) =3463a(14) =3533a(15) =3643a(16) =4363a(17) =4463a(18) =4643a(19) =4663a(20) =5333a(21) =5443a(22) =5563a(23) =5653a(24) =6343a(25) =6353a(26) =6553a(27) =6563a(28) =6653a(29) =33343