E.g.f.: 1/(cos(x) - sin(x)*sinh(x)), omitting the zero-valued coefficients of odd powers of x.

A227051

E.g.f.: 1/(cos(x) - sin(x)*sinh(x)), omitting the zero-valued coefficients of odd powers of x.

Terms

    a(0) =1a(1) =3a(2) =53a(3) =2333a(4) =191673a(5) =25307913a(6) =4900979093

External references