Primes having only {0, 4, 6, 9} as digits.

Terms

a(0) =409a(1) =449a(2) =499a(3) =4049a(4) =4099a(5) =4409a(6) =4649a(7) =4909a(8) =4969a(9) =4999a(10) =6449a(11) =6469a(12) =6949a(13) =9049a(14) =9649a(15) =9949a(16) =40009a(17) =40099a(18) =40499a(19) =40609a(20) =40699a(21) =40949a(22) =44449a(23) =44699a(24) =44909a(25) =46049a(26) =46099a(27) =46499a(28) =46649a(29) =49009