a(n) = Sum_{ d|n } sigma(n/d)*d^4.

Terms

a(0) =1a(1) =19a(2) =85a(3) =311a(4) =631a(5) =1615a(6) =2409a(7) =4991a(8) =6898a(9) =11989a(10) =14653a(11) =26435a(12) =28575a(13) =45771a(14) =53635a(15) =79887a(16) =83539a(17) =131062a(18) =130341a(19) =196241a(20) =204765a(21) =278407a(22) =279865a(23) =424235a(24) =394406a(25) =542925a(26) =558778a(27) =749199a(28) =707311a(29) =1019065