Expansion of E.g.f. cos(sin(tanh(x))), even powers only.

A009040

Expansion of E.g.f. cos(sin(tanh(x))), even powers only.

Terms

    a(0) =1a(1) =-1a(2) =13a(3) =-373a(4) =18649a(5) =-1433129a(6) =156563045a(7) =-23043285021

External references