E.g.f.: arcsinh(arcsin(x)^2) (even powers only).

A012346

E.g.f.: arcsinh(arcsin(x)^2) (even powers only).

Terms

    a(0) =0a(1) =2a(2) =8a(3) =8a(4) =-2112a(5) =42912a(6) =30652800a(7) =4329375360a(8) =111548774400

External references