a(n) = n*sigma_8(n).

Terms

a(0) =0a(1) =1a(2) =514a(3) =19686a(4) =263172a(5) =1953130a(6) =10118604a(7) =40353614a(8) =134744072a(9) =387479547a(10) =1003908820a(11) =2357947702a(12) =5180803992a(13) =10604499386a(14) =20741757596a(15) =38449317180a(16) =68988964880a(17) =118587876514a(18) =199164487158a(19) =322687697798a(20) =514009128360a(21) =794401245204