a(n) = ceiling(10^(n-1)/n).

Terms

a(0) =1a(1) =5a(2) =34a(3) =250a(4) =2000a(5) =16667a(6) =142858a(7) =1250000a(8) =11111112a(9) =100000000a(10) =909090910a(11) =8333333334a(12) =76923076924a(13) =714285714286