E.g.f.: cosh(log(x+1)-arctanh(x)) (even powers only).

A013302

E.g.f.: cosh(log(x+1)-arctanh(x)) (even powers only).

Terms

    a(0) =1a(1) =0a(2) =3a(3) =90a(4) =4725a(5) =396900a(6) =49116375a(7) =8428369950

External references