Primes having only {2, 4, 6, 9} as digits.

Terms

a(0) =2a(1) =29a(2) =229a(3) =269a(4) =449a(5) =499a(6) =929a(7) =2269a(8) =2699a(9) =2969a(10) =2999a(11) =4229a(12) =4649a(13) =4969a(14) =4999a(15) =6229a(16) =6269a(17) =6299a(18) =6449a(19) =6469a(20) =6949a(21) =9629a(22) =9649a(23) =9929a(24) =9949a(25) =22229a(26) =22469a(27) =22669a(28) =22699a(29) =24229