Expansion of cos(sin(x))/cosh(x), even terms only.

A009044

Expansion of cos(sin(x))/cosh(x), even terms only.

Terms

    a(0) =1a(1) =-2a(2) =16a(3) =-248a(4) =6336a(5) =-244480a(6) =13409408a(7) =-999327488a(8) =97590304768

External references