a(n) = n^4*sigma_5(n).

Terms

a(0) =0a(1) =1a(2) =528a(3) =19764a(4) =270592a(5) =1953750a(6) =10435392a(7) =40356008a(8) =138547200a(9) =389021373a(10) =1031580000a(11) =2357962332a(12) =5347980288a(13) =10604527934a(14) =21307972224a(15) =38613915000a(16) =70936231936a(17) =118587960018a(18) =205403284944a(19) =322687828100a(20) =528669120000a(21) =797596142112