Expansion of E.g.f.: cos(cosh(x)*x) (even powers only).

A009016

Expansion of E.g.f.: cos(cosh(x)*x) (even powers only).

Terms

    a(0) =1a(1) =-1a(2) =-11a(3) =-61a(4) =1737a(5) =88679a(6) =2086525a(7) =-45950997a(8) =-9763133167a(9) =-705668046769

External references