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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =6a(4) =-22a(5) =120a(6) =-856a(7) =7056a(8) =-68272a(9) =758400a(10) =-9452416a(11) =130918656a(12) =-1995427072a(13) =33173038080a(14) =-597434776576