Expansion of e.g.f.: 2*cos(r*x)^2 / (1 + cos(r*x)^2) where r = sqrt(2), even terms only.
A263249
Expansion of e.g.f.: 2*cos(r*x)^2 / (1 + cos(r*x)^2) where r = sqrt(2), even terms only.
Terms
- a(0) =1a(1) =-2a(2) =-8a(3) =112a(4) =9088a(5) =310528a(6) =-14701568a(7) =-4554426368a(8) =-458243735552
External references
- oeis: A263249