a(1)=1; for n>1, a(n) = 9*a(n-1) + n.

Terms

a(0) =1a(1) =11a(2) =102a(3) =922a(4) =8303a(5) =74733a(6) =672604a(7) =6053444a(8) =54481005a(9) =490329055a(10) =4412961506a(11) =39716653566a(12) =357449882107