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

A009670

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

Terms

    a(0) =1a(1) =-2a(2) =-48a(3) =880a(4) =59136a(5) =-4558336a(6) =-358510592a(7) =87349164032

External references