Expansion of e.g.f. sin(x)*sin(tan(x)) (even powers only).

A009548

Expansion of e.g.f. sin(x)*sin(tan(x)) (even powers only).

Terms

    a(0) =0a(1) =2a(2) =0a(3) =-32a(4) =-1984a(5) =-118016a(6) =-8529920a(7) =-754714880a(8) =-79868821504

External references