a(n) = 11^n - n^7.

Terms

a(0) =1a(1) =10a(2) =-7a(3) =-856a(4) =-1743a(5) =82926a(6) =1491625a(7) =18663628a(8) =212261729a(9) =2353164722a(10) =25927424601a(11) =285292183440