a(n) = n^4*sigma_2(n).

Terms

a(0) =0a(1) =1a(2) =80a(3) =810a(4) =5376a(5) =16250a(6) =64800a(7) =120050a(8) =348160a(9) =597051a(10) =1300000a(11) =1786202a(12) =4354560a(13) =4855370a(14) =9604000a(15) =13162500a(16) =22347776a(17) =24221090a(18) =47764080a(19) =47176202a(20) =87360000a(21) =97240500a(22) =142896160a(23) =148315730a(24) =282009600a(25) =254296875a(26) =388429600a(27) =435781620a(28) =645388800a(29) =595530602