Pascal's Triangle

This may look like a neatly arranged stack of numbers,but it's actually a mathematical treasure trove Indian mathematicians called it the Staircase of Mount Meru.In Iran, it's the Khayyam Triangle.And in China, it's Yang Hui's Triangle.To much of the Western world,it's known as Pascal's Triangle after French mathematician Blaise Pascal,which seems a bit unfair since he was clearly late to the party,but he still had a lot to contribute.