a(n) = [ Sum{(log(j)-log(i))^3} ], 2 <= i < j <= n.

Terms

a(0) =0a(1) =0a(2) =1a(3) =3a(4) =5a(5) =9a(6) =15a(7) =22a(8) =31a(9) =42a(10) =55a(11) =71a(12) =88a(13) =108a(14) =131a(15) =157a(16) =185a(17) =216a(18) =249a(19) =286a(20) =326a(21) =369a(22) =415a(23) =464a(24) =516a(25) =572a(26) =632a(27) =694a(28) =760a(29) =830