Expansion of e.g.f. of arctan(sec(x)*arcsinh(x)) (odd coefficients only).

A012825

Expansion of e.g.f. of arctan(sec(x)*arcsinh(x)) (odd coefficients only).

Terms

    a(0) =1a(1) =0a(2) =8a(3) =-392a(4) =20096a(5) =-1754368a(6) =241340032a(7) =-44833033216

External references