E.g.f. tan(cos(x)*x) (odd powers only).

A009633

E.g.f. tan(cos(x)*x) (odd powers only).

Terms

    a(0) =1a(1) =-1a(2) =-39a(3) =55a(4) =39697a(5) =-2289a(6) =-235548247a(7) =-1367615353

External references