Hockey Stick Theorem

Hockey Stick Theorem

The Hockey-stick theorem states: http://www.artofproblemsolving.com/Forum/code.php?hash=6bb7bab8c684ac4f4689a78c4994f8bad532c781&sid=07281467fd1a64b352d341e46a7f0f9a Its name is due to the "hockey-stick" which appears when the numbers are plotted on Pascal's Triangle, as shown in the representation of the theorem to the right (where n=2 and k=3).