a(n) = 11*9^n+1.

Terms

a(0) =12a(1) =100a(2) =892a(3) =8020a(4) =72172a(5) =649540a(6) =5845852a(7) =52612660a(8) =473513932a(9) =4261625380a(10) =38354628412a(11) =345191655700