a(n) = n^7*(n^6 + 1)/2.A168663a(n) = n^7*(n^6 + 1)/2.Terms a(0) =0a(1) =1a(2) =4160a(3) =798255a(4) =33562624a(5) =610390625a(6) =6530486976a(7) =48444916975a(8) =274878955520External referencesoeis: A168663