a(n) = n*9^n + 1.

Terms

a(0) =1a(1) =10a(2) =163a(3) =2188a(4) =26245a(5) =295246a(6) =3188647a(7) =33480784a(8) =344373769a(9) =3486784402a(10) =34867844011a(11) =345191655700