Expansion of e.g.f.: tanh(x)*sin(tan(x))/2 (even part).

A024229

Expansion of e.g.f.: tanh(x)*sin(tan(x))/2 (even part).

Terms

    a(0) =0a(1) =1a(2) =-2a(3) =19a(4) =-1572a(5) =-24763a(6) =-5174758a(7) =-230357353a(8) =-45947071688

External references