N = int(input())
ans = [[-1] * N for _ in range(N)]
x, y = 0, 0
dx = [0, 1, 0, -1]
dy = [1, 0, -1, 0]

def f(s):
    return "0" * (3 - len(str(s))) + str(s)

k = 0
for i in range(N*N):
    ans[x][y] = f(i + 1)
    nx, ny = x + dx[k], y + dy[k]
    if nx < 0 or nx > N - 1 or ny < 0 or ny > N - 1:
        k = (k + 1) % 4
    elif ans[nx][ny] != -1:
        k = (k + 1) % 4
    x, y = x + dx[k], y + dy[k]
       
for a in ans:
    print(*a)