Numerators of expansion of e.g.f. 2^(-1/2) * arcsinh(cos(x)), even powers only.

A101922

Numerators of expansion of e.g.f. 2^(-1/2) * arcsinh(cos(x)), even powers only.

Terms

    a(0) =-1a(1) =-1a(2) =11a(3) =491a(4) =11159a(5) =-460681a(6) =-103577629a(7) =-8160790429a(8) =624333860399

External references