Primes that contain digits 3 and 4 only.

Terms

a(0) =3a(1) =43a(2) =433a(3) =443a(4) =3343a(5) =3433a(6) =33343a(7) =333433a(8) =334333a(9) =343333a(10) =343433a(11) =444343a(12) =444443a(13) =3333433a(14) =3343343a(15) =3343433a(16) =3344333a(17) =3344443a(18) =3433333a(19) =3434443a(20) =3443443a(21) =3444443a(22) =4344443a(23) =4433333a(24) =4434343a(25) =4443433a(26) =34333333a(27) =34434343a(28) =34444343a(29) =43444433