Expansion of tan(x)*cos(tan(x)).

A009729

Expansion of tan(x)*cos(tan(x)).

Terms

    a(0) =1a(1) =-1a(2) =-39a(3) =-1233a(4) =-50831a(5) =-2696321a(6) =-173033847a(7) =-12037460945a(8) =-631883857695

External references