Expansion of sin(tanh(x))*cos(x).

A009523

Expansion of sin(tanh(x))*cos(x).

Terms

    a(0) =1a(1) =-6a(2) =72a(3) =-1848a(4) =81088a(5) =-5318016a(6) =483162240a(7) =-57865303296

External references