E.g.f.: -arcsin(arcsin(x) - arctanh(x)) (odd powers only).

A013431

E.g.f.: -arcsin(arcsin(x) - arctanh(x)) (odd powers only).

Terms

    a(0) =0a(1) =1a(2) =15a(3) =495a(4) =29575a(5) =2805075a(6) =387547875a(7) =73496998575

External references