a(n) = 11^n - n^9.

Terms

a(0) =1a(1) =10a(2) =-391a(3) =-18352a(4) =-247503a(5) =-1792074a(6) =-8306135a(7) =-20866436a(8) =80141153a(9) =1970527202a(10) =24937424601a(11) =282953722920