Numbers whose base-10 representation has the same nonzero number of 8's and 9's.

Terms

a(0) =89a(1) =98a(2) =189a(3) =198a(4) =289a(5) =298a(6) =389a(7) =398a(8) =489a(9) =498a(10) =589a(11) =598a(12) =689a(13) =698a(14) =789a(15) =798a(16) =809a(17) =819a(18) =829a(19) =839a(20) =849a(21) =859a(22) =869a(23) =879a(24) =890a(25) =891a(26) =892a(27) =893a(28) =894a(29) =895