Expansion of e.g.f. (1/2)*(1+x)*log((1+x)/(1-x)).

Terms

a(0) =0a(1) =1a(2) =2a(3) =2a(4) =8a(5) =24a(6) =144a(7) =720a(8) =5760a(9) =40320a(10) =403200a(11) =3628800a(12) =43545600a(13) =479001600a(14) =6706022400a(15) =87178291200