magic square of order n is defined to be an n n matrix made out of the integers from [1..n2] arranged in such a way that the sum of every row, column, and the two main diagonals is the same. For example

is a magic square of order 5, because each row, column and main diagonal sums up to 65. Formulate the problem of finding a magic square of order n as a task of finding a solution to a CSP.