sum[(-1)^(n-k) catalan^k k^m E^(-I k t) (1 + E^(I t))^n/(2 Pi),{k,0,infty}]

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.