A bisection of A101678.

Terms

a(0) =1a(1) =9a(2) =89a(3) =991a(4) =9909a(5) =88991a(6) =899911a(7) =9999009a(8) =99990089a(9) =899910991a(10) =8899099911a(11) =99089999009a(12) =990999990091