E.g.f. sin(sin(x))/cosh(x) (odd powers only).

A009480

E.g.f. sin(sin(x))/cosh(x) (odd powers only).

Terms

    a(0) =1a(1) =-5a(2) =57a(3) =-1157a(4) =36753a(5) =-1702725a(6) =109438409a(7) =-9375819525

External references