Expansion of e.g.f.: sech(arcsin(x)*sin(x)).

A012339

Expansion of e.g.f.: sech(arcsin(x)*sin(x)).

Terms

    a(0) =1a(1) =0a(2) =-12a(3) =0a(4) =6160a(5) =-120960a(6) =-30419136a(7) =720079360a(8) =289764450560

External references