A pyramid is being built with cubes, as shown. On the top layer is one cube. Under that is a layer of 4 cubes arranged in a square. The third layer has 9 cubes arranged in a square. If this pattern continues indefinitely,

A pyramid is being built with cubes as shown On the top layer is one cube Under that is a layer of 4 cubes arranged in a square The third layer has 9 cubes arra class=