https://en.wikipedia.org/wiki/Plimpton_322

Add this to the list of 322, including Genesis 3:22, the three pillars and twenty-two paths of Kabbalah’s Tree of Life, and the philosophers who died in the year 322 that Skull and Bones says they relate the number to. The 15 rows in Plimpton 322 might relate to the why Skull and Bones allows 15 members each year.