Expansion of e.g.f. tan(x)*x (even powers only).

A009752

Expansion of e.g.f. tan(x)*x (even powers only).

Terms

    a(0) =0a(1) =2a(2) =8a(3) =96a(4) =2176a(5) =79360a(6) =4245504a(7) =313155584a(8) =30460116992

External references