Numerators of first difference of squares of harmonic numbers.

Terms

a(0) =1a(1) =5a(2) =10a(3) =47a(4) =131a(5) =71a(6) =353a(7) =1487a(8) =6989a(9) =1451a(10) =82451a(11) =42433a(12) =1132133a(13) =1158863a(14) =236749a(15) =4828073a(16) =41781863a(17) =42482563a(18) =273253759a(19) =277235737a(20) =56204647a(21) =18975625a(22) =441730115a(23) =670193263a(24) =33874048171a(25) =34224132367a(26) =311048966203a(27) =313970420453