Magic square

Statement

In mathematics, especially historical and recreational mathematics, a magic square is a square array of numbers, usually positive integers, where the sums of the numbers in each row, each column, and both main diagonals are the same. The order of a magic square is the number of integers along one side (n), and the constant sum is called the magic constant or magic sum. If the array includes just the positive integers $1,2,...,n^2$, the magic square is said to be normal. Many authors take magic square to mean normal magic square.