from collections import deque

def main():
    N = int(input())

    dir = deque([(0, 1), (1, 0), (0, -1), (-1, 0)])
    grid = [[0 for _ in [0] * N] for _ in [0] * N]
    grid[0][0] = '001'
    x, y = 0, 0
    n = 2
    while n <= N * N:
        i, j = dir[0]
        if all((0 <= x + i < N, 0 <= y + j < N)):
            if grid[x+i][y+j] == 0:
                grid[x+i][y+j] = str(n).zfill(3)
                x += i
                y += j
                n += 1
            else:
                dir.rotate(-1)
        else:
            dir.rotate(-1)

    for n in grid:
        print(*n, sep=' ')

main()