Expansion of e.g.f. sech(sin(x)*sin(x)), even powers only.
A012303
Expansion of e.g.f. sech(sin(x)*sin(x)), even powers only.
Terms
- a(0) =1a(1) =0a(2) =-12a(3) =240a(4) =4368a(5) =-942720a(6) =42639168a(7) =8638506240
External references
- oeis: A012303