Expansion of e.g.f. tanh(sinh(x)*sin(x))/2 in odd powers of x^2.

A009805

Expansion of e.g.f. tanh(sinh(x)*sin(x))/2 in odd powers of x^2.

Terms

    a(0) =1a(1) =-124a(2) =262096a(3) =-2681078464

External references