N = int(input())

field = [[None] * N for i in range(N)]
y, x = 0, 0
mode = 0
d = {0: (0, 1), 1: (1, 0), 2: (0, -1), 3: (-1, 0)}
for i in range(1, N * N + 1):
    field[y][x] = "{0:03d}".format(i)
    y, x = y + d[mode][0], x + d[mode][1]

    ny, nx = y + d[mode][0], x + d[mode][1]
    if 0 <= ny < N and 0 <= nx < N and field[ny][nx] is None:
        pass
    else:
        mode = (mode + 1) % 4

for line in field:
    print(*line)