Expansion of e.g.f. tanh(arctan(sin(x))), odd powers only.

A012190

Expansion of e.g.f. tanh(arctan(sin(x))), odd powers only.

Terms

    a(0) =1a(1) =-5a(2) =121a(3) =-6845a(4) =690481a(5) =-108594485a(6) =24502918441

External references