Expansion of tanh(sin(x))/cos(x) (odd powers only).

A009797

Expansion of tanh(sin(x))/cos(x) (odd powers only).

Terms

    a(0) =1a(1) =0a(2) =32a(3) =-336a(4) =31744a(5) =-1588224a(6) =207515648a(7) =-24843657216

External references