Can't find the file but anyway, I had accidentally created
   [1]https://en.wikipedia.org/wiki/Ulam_spiral - in Excel and was
   blown away at the patterns.* I just typed in 1, then 2 next to
   it, then I went up and typed 3 then left and type 5, and so on
   and so on. I was so excited for a few minutes.* Then I looked it
   up "number spirals" and such 'til I came across the same
   pattern. Oh well.. at least my brain was in good company.

References

   Visible links
   1. https://en.wikipedia.org/wiki/Ulam_spiral