Explanation 11x11 magic square
The 11 x 11 magic square is odd and a prime number. To construct a 11x11 magic square use the same methods to construct a 5x5 and 7x7 magic square. Most perfect magic 11x11 square is panmagic and symmetric.
For more detailed explanation see the 5x5 magic square.
The methods to construct an 11x11 magic square are:
With the first three methods you can construct simple, symmetric 11x11 magic squares.
Use the shift method to construct panmagic 11x11 squares.
The ultra magic 11x11 square is panmagic and symmetric.
Concentric and ultra 9x9 in 11x11 are specials.