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

A009563

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

Terms

    a(0) =1a(1) =-4a(2) =56a(3) =-1688a(4) =84160a(5) =-6141312a(6) =613282944a(7) =-80158806016

External references