For Harry Potter story purposes I need some sort of MAJOR arcane arithmantical significance in the numbers etc. - I'm guessing that Arithmancy works something like a more complex version of numerology, but I'm quite happy for it to be some other sort of mathematical progresson or something. Any suggestions?
Later - correct total is 692, my bad. Comes from a background in physics and biology, not maths, it's the right order of magnitude...
Also posted at https://ffutures.dreamwidth.org/2139411.html, where there are