Main table :

Some (interesting) observations :

- Just a minor note :
A B C ... 110 108 104 98 90 80 68 54 38 20 A-B B-C ... 2 4 6 8 10 12 14 16 18 - Perfect squares are alternatively odd, then even (in fact, an odd number will produce an odd square number, and even number will produce an even one).