求n（奇数）阶幻方。n阶幻方是n×n的方阵，填入1～n2各数，使得该方阵的各行各列、对角线元素的和都相等。-Find n (odd) order magic square. magic square of order n is the n × n square, fill in the 1 ~ n2 the number, making the square of each row of the column, and diagonal elements are equal.