a(n) = n^3*sigma_6(n).

Terms

a(0) =0a(1) =1a(2) =520a(3) =19710a(4) =266304a(5) =1953250a(6) =10249200a(7) =40353950a(8) =136348160a(9) =387952659a(10) =1015690000a(11) =2357949022a(12) =5248851840a(13) =10604501570a(14) =20984054000a(15) =38498557500a(16) =69810262016a(17) =118587881410a(18) =201735382680a(19) =322687704638a(20) =520158288000a(21) =795376354500