I recently happened upon the textbook “Triangular Arrays with Applications” and decided to pick up a copy. I’m certainly no number theorist, but I still enjoy a good triangular arrangement of numbers as much as the next person. My typical strategy for understanding something mathy is to write some code and to see lots and lots of examples to develop intuition. I suppose I’m one of those people who need to burn their hands on the stove multiple times to realize that doing so is a bad idea.