Primes having only {0, 7, 8, 9} as digits.

Terms

a(0) =7a(1) =79a(2) =89a(3) =97a(4) =709a(5) =787a(6) =797a(7) =809a(8) =877a(9) =887a(10) =907a(11) =977a(12) =997a(13) =7079a(14) =7789a(15) =7877a(16) =7879a(17) =7907a(18) =8009a(19) =8087a(20) =8089a(21) =8707a(22) =8779a(23) =8807a(24) =8887a(25) =8999a(26) =9007a(27) =9787a(28) =9887a(29) =9907