Primes having only {0, 3, 7} as digits.

Terms

a(0) =3a(1) =7a(2) =37a(3) =73a(4) =307a(5) =337a(6) =373a(7) =733a(8) =773a(9) =3037a(10) =3307a(11) =3373a(12) =3733a(13) =7307a(14) =7333a(15) =7703a(16) =30307a(17) =30703a(18) =30707a(19) =30773a(20) =33037a(21) =33073a(22) =33377a(23) =33703a(24) =33773a(25) =37003a(26) =37307a(27) =37337a(28) =70003a(29) =70373