Talk:Sum of Squares of Binomial Coefficients

Isn't this just a special case of the Chu-Vandermonde Identity?


 * It appears so. Feel free to add a proof along those lines on Sum of Squares of Binomial Coefficients/Proof 3 (simply copy e.g. the content of the Combinatorial Proof page and adapt the proof section). --Lord_Farin (talk) 13:32, 30 November 2012 (UTC)