Maybe from Radbaz on the missing 4-pronged ‘shin’?
Thanks. The name might help me pin down info online.
It’s mentioned as the last entry in the Tree of Souls (670. A NEW TORAH, pg. 522) but without a reference.
The shin is an interesting letter as the eternal flame, having the value of 300 which is the same as “Ruach Elohim”. As such linking to Rashi’s dove analogy in Gen 1.2, and the W (the 23rd letter of the English alphabet) being of similar form (as a shin or bird/dove/spirit).
It goes on as being the double “U”, U spelled yud-vav, the name of God that no one seems to be able to pin down as an actual separate name of God, yet close enough that 16 is tet-zayin.
It always boils down to some simple meaning; e.g. “U” (you, the individual made in the likeness of God), was never meant to be... just some number.