Ulam sprials are super interesting. I developed a visualization (and some explanation) once just to understand the problem a little better. Maybe this sparks so

Ulam sprials are super interesting. I developed a visualization (and some explanation) once just to understand the problem a little better. Maybe this sparks some interest in someone :) https://tessi.github.io/walking-the-ulam-spiral/ https://tessi.github.io/walking-the-ulam-spiral/