a(n) = Sum_{d|n} d^3*A000593(n/d).

Terms

a(0) =1a(1) =9a(2) =31a(3) =73a(4) =131a(5) =279a(6) =351a(7) =585a(8) =850a(9) =1179a(10) =1343a(11) =2263a(12) =2211a(13) =3159a(14) =4061a(15) =4681a(16) =4931a(17) =7650a(18) =6879a(19) =9563a(20) =10881a(21) =12087a(22) =12191a(23) =18135a(24) =16406a(25) =19899a(26) =22990a(27) =25623a(28) =24419a(29) =36549