21. Can the same PT be on different rows?
No. It is always unique to a specific row.
22. Can more than one PT be on the same row?
Yes, there can be 2, 3, 4, … other sized PTs that occupy the same row—each has its Squared Pair-Sets of b and a values.
23. Are the PTs connected in any way?
Yes, absolutely! Every PT is ultimately connected to every other PT and that Number Sequence Patterning is presented in TPISC I: Basics (free) and TPISC II: Advanced.