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

Terms

a(0) =0a(1) =1a(2) =0a(3) =5a(4) =-12a(5) =96a(6) =-480a(7) =3968a(8) =-29568a(9) =283840a(10) =-2759040a(11) =31139712a(12) =-369431040a(13) =4852567552a(14) =-67622790144