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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =4a(4) =-16a(5) =91a(6) =-616a(7) =4894a(8) =-44416a(9) =453541a(10) =-5145856a(11) =64222984a(12) =-874402816a(13) =12897183391a(14) =-204862698496