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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =1a(4) =0a(5) =-14a(6) =150a(7) =-1322a(8) =10976a(9) =-87824a(10) =655920a(11) =-3981152a(12) =5308512a(13) =458307760a(14) =-12593915152a(15) =254156155888