Expansion of e.g.f. sin(x)/cosh(tan(x)) (odd powers only).

A009559

Expansion of e.g.f. sin(x)/cosh(tan(x)) (odd powers only).

Terms

    a(0) =1a(1) =-4a(2) =-4a(3) =104a(4) =5392a(5) =167936a(6) =1592384a(7) =-401669248a(8) =-50456008448

External references