E.g.f. sin(x*tan(x)) (even powers only).

A009515

E.g.f. sin(x*tan(x)) (even powers only).

Terms

    a(0) =0a(1) =2a(2) =8a(3) =-24a(4) =-4544a(5) =-333920a(6) =-26272896a(7) =-2354853760a(8) =-233143441408

External references