Expansion of e.g.f. cosh(sin(sin(x))), even powers only.
A009142
Expansion of e.g.f. cosh(sin(sin(x))), even powers only.
Terms
- a(0) =1a(1) =1a(2) =-7a(3) =73a(4) =-687a(5) =-19471a(6) =2839561a(7) =-260138759a(8) =22560194593
External references
- oeis: A009142