Expansion of e.g.f. cos(x)*cos(sinh(x)), even powers only.
A009098
Expansion of e.g.f. cos(x)*cos(sinh(x)), even powers only.
Terms
- a(0) =1a(1) =-2a(2) =4a(3) =32a(4) =-48a(5) =-5600a(6) =-85568a(7) =533504a(8) =85827840a(9) =3149702656a(10) =27282224128
External references
- oeis: A009098