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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =1a(4) =-2a(5) =13a(6) =-64a(7) =173a(8) =-720a(9) =12409a(10) =-114816a(11) =370137a(12) =-1491456a(13) =88556037a(14) =-1263184896a(15) =2668274373a(16) =21448022016