Expansion of e.g.f. sech(arcsinh(x)*arcsin(x)) in powers of x^4.

A012609

Expansion of e.g.f. sech(arcsinh(x)*arcsin(x)) in powers of x^4.

Terms

    a(0) =1a(1) =-12a(2) =3472a(3) =-20044992a(4) =-47937777408

External references