Primes having only {0, 2, 5, 7} as digits.

Terms

a(0) =2a(1) =5a(2) =7a(3) =227a(4) =257a(5) =277a(6) =557a(7) =577a(8) =727a(9) =757a(10) =2027a(11) =2207a(12) =2557a(13) =2707a(14) =2777a(15) =5077a(16) =5227a(17) =5507a(18) =5527a(19) =5557a(20) =7027a(21) =7057a(22) =7207a(23) =7507a(24) =7577a(25) =7727a(26) =7757a(27) =20507a(28) =20707a(29) =22027