Primes having only {0, 2, 7, 8} as digits.

Terms

a(0) =2a(1) =7a(2) =227a(3) =277a(4) =727a(5) =787a(6) =827a(7) =877a(8) =887a(9) =2027a(10) =2087a(11) =2207a(12) =2287a(13) =2707a(14) =2777a(15) =2887a(16) =7027a(17) =7207a(18) =7727a(19) =7877a(20) =8087a(21) =8287a(22) =8707a(23) =8807a(24) =8887a(25) =20287a(26) =20707a(27) =20807a(28) =20887a(29) =22027