n=int(input())
m=[None]*n
for i in range(n):
    m[i] = [None]*n
d=0
v,x,y=1,0,0

while v <= n*n:
    if 0 <= x < n and 0 <= y < n and m[y][x] is None:
        m[y][x] = str(v).rjust(3, '0')

        if d % 4 == 0:
            x += 1
        elif d % 4 == 1:
            y += 1
        elif d % 4 == 2:
            x -= 1
        else:
            y -= 1
        v += 1
    else:
        if d % 4 == 0:
            x -= 1
        elif d % 4 == 1:
            y -= 1
        elif d % 4 == 2:
            x += 1
        else:
            y += 1
        d += 1
        if d % 4 == 0:
            x += 1
        elif d % 4 == 1:
            y += 1
        elif d % 4 == 2:
            x -= 1
        else:
            y -= 1

for i in range(n):
    print(' '.join(m[i]))