Primes consisting only of digits 8 and 9 occurring with equal frequency.

Terms

a(0) =89a(1) =88989899a(2) =98988899a(3) =98989889a(4) =99898889a(5) =8889899899a(6) =8889988999a(7) =8889998899a(8) =8898988999a(9) =8898989989a(10) =8899889989a(11) =8988998899a(12) =8988999889a(13) =8989889899a(14) =8989889989a(15) =8989899889a(16) =8989988899a(17) =8998998889a(18) =8999888899a(19) =9888899899a(20) =9888989899a(21) =9889898899a(22) =9889988989