a(n) = n^9*(11*n+9)/2.

Terms

a(0) =0a(1) =10a(2) =7936a(3) =413343a(4) =6946816a(5) =62500000a(6) =377913600a(7) =1735205101a(8) =6509559808a(9) =20920706406a(10) =59500000000a(11) =153266599915a(12) =363764514816a(13) =805941952348