a(n) = n^3*9^n.A128795a(n) = n^3*9^n.Terms a(0) =0a(1) =9a(2) =648a(3) =19683a(4) =419904a(5) =7381125a(6) =114791256a(7) =1640558367a(8) =22039921152a(9) =282429536481External referencesoeis: A128795