10^n-9n for n>=1.

Terms

a(0) =0a(1) =1a(2) =82a(3) =973a(4) =9964a(5) =99955a(6) =999946a(7) =9999937a(8) =99999928a(9) =999999919a(10) =9999999910a(11) =99999999901a(12) =999999999892