a(n) = Sum_{d|n} sigma(n/d)*d^3.

Terms

a(0) =1a(1) =11a(2) =31a(3) =95a(4) =131a(5) =341a(6) =351a(7) =775a(8) =850a(9) =1441a(10) =1343a(11) =2945a(12) =2211a(13) =3861a(14) =4061a(15) =6231a(16) =4931a(17) =9350a(18) =6879a(19) =12445a(20) =10881a(21) =14773a(22) =12191a(23) =24025a(24) =16406a(25) =24321a(26) =22990a(27) =33345a(28) =24419a(29) =44671