Partial sums of A001159: Sum_{j=1..n} sigma_4(j).

Terms

a(0) =1a(1) =18a(2) =100a(3) =373a(4) =999a(5) =2393a(6) =4795a(7) =9164a(8) =15807a(9) =26449a(10) =41091a(11) =63477a(12) =92039a(13) =132873a(14) =184205a(15) =254110a(16) =337632a(17) =450563a(18) =580885a(19) =751783a(20) =948747a(21) =1197661a(22) =1477503a(23) =1835761a(24) =2227012a(25) =2712566a(26) =3250650a(27) =3906396a(28) =4613678a(29) =5486322