Expansion of e.g.f.: tan(sin(arctan(x))) (odd powers only).

A012021

Expansion of e.g.f.: tan(sin(arctan(x))) (odd powers only).

Terms

    a(0) =1a(1) =-1a(2) =1a(3) =167a(4) =-14303a(5) =1383887a(6) =-170123615a(7) =26560717367

External references