Expansion of e.g.f. cosh(sin(tan(x))), even powers only.

A009143

Expansion of e.g.f. cosh(sin(tan(x))), even powers only.

Terms

    a(0) =1a(1) =1a(2) =5a(3) =13a(4) =-2199a(5) =-218311a(6) =-20057555a(7) =-1933691003a(8) =-181405779887

External references