a(n) = n^9*(n^5 + 1)/2.A170787a(n) = n^9*(n^5 + 1)/2.Terms a(0) =0a(1) =1a(2) =8448a(3) =2401326a(4) =134348800a(5) =3052734375a(6) =39187120896a(7) =339131713228External referencesoeis: A170787