Expansion of log(1+x)*cosh(sinh(x)).

Terms

a(0) =0a(1) =1a(2) =-1a(3) =5a(4) =-12a(5) =69a(6) =-285a(7) =1833a(8) =-11536a(9) =91689a(10) =-782865a(11) =7685325a(12) =-82339884a(13) =973147629a(14) =-12466581309a(15) =172666976433