Expansion of sinh(tanh(log(1+x))).

Terms

a(0) =0a(1) =1a(2) =-1a(3) =1a(4) =0a(5) =-14a(6) =150a(7) =-1154a(8) =6272a(9) =-10016a(10) =-305280a(11) =5160376a(12) =-49699056a(13) =248457496a(14) =1844013080a(15) =-69019386344