During the vacation period after an intensely difficult semester at university I ended up working on a particular sub-case of Zarankiewicz's problem, eventually getting an OEIS sequence up with my results. There still remained unfinished business left from before the semester, but it took me quite some time to stop exploring further – this is for Starponys (a monthly reward) and the 2022 Derpibooru community collaboration.

SVG here.