Stop one moment and let's make a rational point of the situation. We have a "raw" sequence (the 5-4 thing) and a "fine" sequence (the 00 thing). At the moment being, we're not sure which sequence is bringing us to the solution, we just know they're linked by a mathematical relation that can be pointed out in many ways...the repeating digits theory is just the empirical observation of the subtraction one, they're actually the same thing. Now. The best way to work on the "raw" sequence in my opinion is building a matrix. The best way to work on the "fine" sequence is to use these 00 numbers NOT as finished data to be used in a character table, but to re-refine them in many other ways...binary, octal, hexadecimal, DECIMAL (we cannot say these 00 numbers are NOT in octal yet)...let's work with logic.