Expansion of e.g.f. cosh(arctan(x)*sin(x)) (only even powers).

A012429

Expansion of e.g.f. cosh(arctan(x)*sin(x)) (only even powers).

Terms

    a(0) =1a(1) =0a(2) =12a(3) =-360a(4) =17360a(5) =-1431360a(6) =176717376a(7) =-30259605376

External references