Numerators of 1-2*HarmonicNumber(n)/(n+1).

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =43a(5) =3a(6) =197a(7) =499a(8) =5471a(9) =589a(10) =82609a(11) =7243a(12) =1376527a(13) =1530967a(14) =1687123a(15) =217033a(16) =68127937a(17) =1290761a(18) =500679401a(19) =107119657a(20) =38046795a(21) =1756445a(22) =983477669a(23) =622806889a(24) =81955769933a(25) =86074407533a(26) =811851812797a(27) =29280696293