Expansion of e.g.f. cos(tanh(x)*cos(x)), even powers only.
A009091
Expansion of e.g.f. cos(tanh(x)*cos(x)), even powers only.
Terms
- a(0) =1a(1) =-1a(2) =21a(3) =-597a(4) =26537a(5) =-1834249a(6) =180938109a(7) =-23781199197
External references
- oeis: A009091