E.g.f.: sin(cos(x)-sech(x)) (even powers only).

A013483

E.g.f.: sin(cos(x)-sech(x)) (even powers only).

Terms

    a(0) =0a(1) =0a(2) =-4a(3) =60a(4) =-1384a(5) =50520a(6) =-2333164a(7) =98460180a(8) =2691348656

External references