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

A009558

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

Terms

    a(0) =1a(1) =-4a(2) =56a(3) =-1576a(4) =74944a(5) =-5428864a(6) =556999808a(7) =-76901598208

External references