You could also point to https://www.math.upenn.edu/~wilf/AeqB.html https://www.math.upenn.edu/~wilf/AeqB.html Both are good reads if you're into that sort of t

You could also point to https://www.math.upenn.edu/~wilf/AeqB.html https://www.math.upenn.edu/~wilf/AeqB.html Both are good reads if you're into that sort of things.