Numerator of n*sum(k=1,(-1)^(k+1)/(n+k)).

Terms

a(0) =1a(1) =1a(2) =13a(3) =43a(4) =347a(5) =1013a(6) =36331a(7) =20431a(8) =973993a(9) =5386001a(10) =15273079a(11) =104604613a(12) =1495109359a(13) =1357580423a(14) =113225690813