Primes having only {4, 5, 9} as digits.

Terms

a(0) =5a(1) =59a(2) =449a(3) =499a(4) =599a(5) =4549a(6) =4999a(7) =5449a(8) =9949a(9) =44449a(10) =44549a(11) =44959a(12) =45599a(13) =45949a(14) =45959a(15) =49459a(16) =49499a(17) =49549a(18) =49559a(19) =49999a(20) =54449a(21) =54499a(22) =54559a(23) =54949a(24) =54959a(25) =55949a(26) =59999a(27) =94559a(28) =94949a(29) =94999