import math
import sys
def S(): return sys.stdin.readline().rstrip()
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int, sys.stdin.readline().rstrip().split())
def LI(): return list(map(int, sys.stdin.readline().rstrip().split()))
def LS(): return list(sys.stdin.readline().rstrip().split())

n = I()

dx = [1, 0, -1, 0]
dy = [0, 1, 0, -1]

s = [[0]*n for _ in range(n)]

x, y = 0, 0
d = 0
for i in range(1, n*n+1):
    s[y][x] = i
    nx = x + dx[d]
    ny = y + dy[d]
    if 0 <= nx < n and 0 <= ny < n and s[ny][nx] == 0:
        x, y = nx, ny
    else:
        d = (d + 1) % 4
        x += dx[d]
        y += dy[d]
for row in s:
    print(" ".join(map(lambda x: '{0:03}'.format(x), row)))