Expansion of e.g.f. cosh(log(1+x)*exp(x)).

Terms

a(0) =1a(1) =0a(2) =1a(3) =3a(4) =12a(5) =30a(6) =180a(7) =490a(8) =5600a(9) =8064a(10) =276360a(11) =-575872a(12) =22950576a(13) =-166106512a(14) =3194871680a(15) =-38456524080a(16) =663548916992