Expansion of e.g.f. cos(arctan(x) + arcsin(x)) = ((1-x^2)^(1/2) - x^2)/(1+x^2)^(1/2), even powers only.
A012989
Expansion of e.g.f. cos(arctan(x) + arcsin(x)) = ((1-x^2)^(1/2) - x^2)/(1+x^2)^(1/2), even powers only.
Terms
- a(0) =1a(1) =-4a(2) =24a(3) =-630a(4) =27720a(5) =-2353050a(6) =267567300a(7) =-46909412550
External references
- oeis: A012989