Making Light:  Open thread 153 ::: February 07, 2011, 01:08 PM

pedantic @24 -- Saying that you can "fill a hexagon with 153 evenly
spaced points" relies on a somewhat unusual definition of "evenly
spaced," as depicted in the Wikipedia article.  I would have called
the centered hexagonal numbers evenly spaced, but 153 is not one of
them.