This rather clunky looking formula—made more clunky by its pixelated nature—is actually rather special. Because the formula is what's used to create the visual representation of the formula which is used to create the...

This is known as Tupper's self-referential formula, and it was developed as part of Jeff Tupper's into developing automated graphing techniques. In a new Numberphile video, Matt Parker explains how it works. It's well worth a watch.[Numberphile]