a(n) = ((9*n + 8)*10^n - 8)/81.

Terms

a(0) =0a(1) =2a(2) =32a(3) =432a(4) =5432a(5) =65432a(6) =765432a(7) =8765432a(8) =98765432a(9) =1098765432a(10) =12098765432a(11) =132098765432