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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =4a(4) =-8a(5) =20a(6) =-61a(7) =208a(8) =-888a(9) =4304a(10) =-24001a(11) =149312a(12) =-1028048a(13) =7745088a(14) =-63374221a(15) =559452416a(16) =-5299033488a(17) =53597321472a(18) =-576514338721