Primes having only {0, 2, 3, 7} as digits.

Terms

a(0) =2a(1) =3a(2) =7a(3) =23a(4) =37a(5) =73a(6) =223a(7) =227a(8) =233a(9) =277a(10) =307a(11) =337a(12) =373a(13) =727a(14) =733a(15) =773a(16) =2003a(17) =2027a(18) =2203a(19) =2207a(20) =2237a(21) =2273a(22) =2333a(23) =2377a(24) =2707a(25) =2777a(26) =3023a(27) =3037a(28) =3203a(29) =3307