Primes having only {0, 5, 9} as digits.

Terms

a(0) =5a(1) =59a(2) =509a(3) =599a(4) =5009a(5) =5059a(6) =5099a(7) =9059a(8) =50599a(9) =50909a(10) =55009a(11) =59009a(12) =59509a(13) =59999a(14) =90059a(15) =90599a(16) =95009a(17) =95959a(18) =99559a(19) =500009a(20) =500509a(21) =500909a(22) =505559a(23) =509909a(24) =509959a(25) =550009a(26) =550909a(27) =559099a(28) =590099a(29) =590599