wasd = [[0, 1], [-1, 0], [0, -1], [1, 0]]#控制snake方向
n = int(input())
square = [[0 for _ in range(n + 1)] for __ in range(n + 1)]#创建初始矩阵，多创建一格防止outofindex

def sq_print():
    #按题目格式打印最终结果
    for i in range(n):
        for j in range(n):
            print(square[i][j], end = ' ')
        print()

def sq_fill():
    x = n - 1
    y = 0#初始位置
    ctrl = 0#控制转向符
    for i in range(1, n * n + 1):
        square[y][x] = i
        x += wasd[ctrl][0]
        y += wasd[ctrl][1]
        if ((x == n - 1) and (y == n - 1)) or ((x == 0) and (y == n - 1)) or ((x == 0) and (y == 0)) or (square[y + wasd[ctrl][1]][x + wasd[ctrl][0]] != 0):
            #当snake触及矩阵底部，或snake将要前往的下一个位置已经有数字的时候，控制转向
            ctrl += 1
            ctrl %= 4#控制符应该是{0,1,2,3}，即模4的循环群

sq_fill()
sq_print()