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

A296742

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

Terms

    a(0) =1a(1) =2a(2) =4a(3) =-8a(4) =2448a(5) =130976a(6) =-2342848a(7) =-239130240a(8) =99052990720

External references