a(n) = n*sigma_4(n).

Terms

a(0) =0a(1) =1a(2) =34a(3) =246a(4) =1092a(5) =3130a(6) =8364a(7) =16814a(8) =34952a(9) =59787a(10) =106420a(11) =161062a(12) =268632a(13) =371306a(14) =571676a(15) =769980a(16) =1118480a(17) =1419874a(18) =2032758a(19) =2476118a(20) =3417960a(21) =4136244a(22) =5476108a(23) =6436366a(24) =8598192a(25) =9781275a(26) =12624404a(27) =14528268a(28) =18360888a(29) =20511178