Numerators of column 3 of table described in A051714/A051715.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =-1a(5) =-4a(6) =-1a(7) =8a(8) =7a(9) =-44a(10) =-2663a(11) =368a(12) =1247a(13) =-244a(14) =-1511a(15) =43416a(16) =1623817a(17) =-276356a(18) =-10405289a(19) =-21376a(20) =21491081a(21) =32209348a(22) =-2523785339a(23) =-107638072a(24) =1827648887a(25) =842271812a(26) =-11254630547