![https://commons.wikimedia.org/wiki/File:Nicomachus_theorem_3D.svg](https://www.futilitycloset.com/wp-content/uploads/2019/12/2019-12-23-cubes-and-squares.png)
MATLAB’s Loren Shure devised this lovely “proof without words” of Nicomachus’ theorem, that the sum of the first n cubes is the square of the nth triangular number:
R.J. Stroeker of Erasmus University wrote, “Every beginning student of number theory surely must have marveled at [this] miraculous fact.”