Primes having only {2, 5, 9} as digits.

Terms

a(0) =2a(1) =5a(2) =29a(3) =59a(4) =229a(5) =599a(6) =929a(7) =2999a(8) =9929a(9) =22229a(10) =22259a(11) =25229a(12) =25999a(13) =29599a(14) =29959a(15) =52259a(16) =52529a(17) =52999a(18) =55229a(19) =55259a(20) =55529a(21) =59929a(22) =59999a(23) =92959a(24) =95929a(25) =95959a(26) =99259a(27) =99529a(28) =99559a(29) =99929