That already seems to have broken... can Tom confirm that it was there? Ah, with some patience, I found a fairly unique one. A YouTube video, linked if you want to investigate what it's about.
It's been some time so I don't entirely remember.... but I liked the post so it probably was there? The link is completely and entirely broken, though.
This does not have the number, but I thought it was interesting: this is a low-quality version of an image, shown while the full image is loading. But the top of the picture is sharper than the rest of it, for some reason. Here's the full picture, by the way. To stay in theme, here's a picture with the number, also quite low-res.
Hm, did GitHub remove this kind of images? I could only get the tiny preview from Google, and couldn't find the large one. But come to think of it, I don't recall ever seeing these graphics on GitHub itself, I only know them from Counting with Pictures... Anyway, I wanted to use this one because when I saw the issue name I thought 'Is this OpenRCT2'? And it was.