Expansion of e.g.f. arctan(log(x+1) - arcsinh(x)).

Terms

a(0) =0a(1) =0a(2) =-1a(3) =3a(4) =-6a(5) =15a(6) =-90a(7) =315a(8) =2520a(9) =-42525a(10) =332640a(11) =-3170475a(12) =43659000a(13) =-387161775a(14) =-469188720a(15) =61992505575