Ask HN: What Is the Name of This Blog?

This is a hail mary, but I'm out of ideas. I'm trying to remember the name of a tech blog I remember really enjoying reading a few years ago. All I remember was:

- The content of the blog was mostly focused on a variety of interesting math, and computer science topics. The blog was extremely well organized, and covered a breadth of topics.

- The UI for the blog had a light purple theme.

- The avatar the author used was a Touhou character (I think?)

- I think the author's username started with an "N".

Does this sound familiar to anyone? Oh if only I'd bookmarked it!