n = int(input())

ANS = [[0 for _ in range(n)] for _ in range(n)]
Directions = [(0, 1), (1, 0), (0, -1), (-1, 0)]
curr = 1
ci, cj = 0, 0
didx = 0
while True:
    ANS[ci][cj] = f"{curr:03}"
    curr += 1
    if curr > n**2:
        break
    while True:
        di, dj = Directions[didx]
        ni, nj = ci + di, cj + dj
        if 0 <= ni < n and 0 <= nj < n and ANS[ni][nj] == 0:
            ci, cj = ni, nj
            break
        didx = (didx + 1) % 4
for i in range(n):
    print(' '.join(ANS[i]))