Alright, now, when you trace a line on the odd numbers in glyph 1 such that you connect them all and link each to the center, you get a T shape with a curvy top.
Do so with the 3 even numbers in glyph 2 and you get a Y shape (all the odds are separated so they must all be joined at the center). Odds and evens don't seem to work like that anywhere else but I wonder if this can be done with different patterns in the other glyphs to get more letters.

It tosses out some unnecessary ones like Chelsea was talking about although birds and hands ticking in strange patterns???