Expansion of E.g.f. cos(sin(sin(x))), even powers only.

A009037

Expansion of E.g.f. cos(sin(sin(x))), even powers only.

Terms

    a(0) =1a(1) =-1a(2) =9a(3) =-153a(4) =4273a(5) =-177489a(6) =10342137a(7) =-800697641a(8) =78896218081

External references