[ Sum (s(j) - s(i))^2 ], 1 <= i < j <= n, where s(k) = 1 + 1/2 + ... + 1/k.

Terms

a(0) =0a(1) =1a(2) =2a(3) =5a(4) =8a(5) =13a(6) =19a(7) =26a(8) =34a(9) =44a(10) =56a(11) =68a(12) =82a(13) =98a(14) =115a(15) =134a(16) =154a(17) =176a(18) =200a(19) =225a(20) =251a(21) =280a(22) =310a(23) =341a(24) =375a(25) =410a(26) =446a(27) =485a(28) =525a(29) =566