In recreational mathematics, a magic square is an arrangement
of numbers in a square grid, where the numbers in each row, and in each column,
and the numbers that run diagonally in both directions, all add up to the same
number. A magic square has the same number of rows as it has columns, and in
conventional math notation, "n" stands for the number of rows it has.
Thus, a magic square always contains n2 numbers, and its size is described as
being "of order n". A magic square that contains the integers from 1
to n2 is called a normal magic square.