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

Terms

a(0) =0a(1) =1a(2) =-2a(3) =10a(4) =-47a(5) =303a(6) =-2389a(7) =22622a(8) =-249724a(9) =3150109a(10) =-44706126a(11) =705095994a(12) =-12235794207a(13) =231698450475