n = int(input())

l = [[0] * n for i in range(n)]
y, x = 0, 0
m = 0
d = {0:(0, 1), 1:(1, 0), 2:(0, -1), 3:(-1, 0)}

for i in range(n**2):
    l[y][x] = "{0:03}".format(i+1)
    y += d[m][0]
    x += d[m][1]
    ny, nx = y+d[m][0], x+d[m][1]
    if not (0 <= ny < n and 0 <= nx < n and l[ny][nx] == 0):
        m = (m+1) % 4

for i in l:
    print(*i)