Explanation 22x22 magic square
The 22x22 magic square is double odd (2x11 is double prime number). Double prime number magic squares have an irregular structure. That's why a pure panmagic, symmetric and/or compact 22x22 magic square does not exist. To get 22x22 magic squares you need to puzzle. Most magic 22x22 square is the concentric or inlaid 22x22 magic square. I have used even and odd inlay magic squares in the same inlaid magic square!!!
Methods to construct the 22x22 magic square are: