Expansion of e.g.f. of cos(arcsin(arcsinh(x))), even powers only.

A012115

Expansion of e.g.f. of cos(arcsin(arcsinh(x))), even powers only.

Terms

    a(0) =1a(1) =-1a(2) =1a(3) =-49a(4) =897a(5) =-96801a(6) =6803457a(7) =-1275363153a(8) =207592347393

External references