n = int(input())

m = list()
for i in range(n):
    m.append([0]*n)

d = 0
i = 0
j = 0
for v in range(1,n*n+1):
    m[i][j] = str(v).zfill(3)
    if d % 4 == 0 and not (j+1 < n and m[i][j+1] == 0):
        d += 1
    elif d % 4 == 1 and not (i+1 < n and m[i+1][j] == 0):
        d += 1
    elif d % 4 == 2 and not (j-1 >= 0 and m[i][j-1] == 0):
        d += 1
    elif d % 4 == 3 and not (i-1 >= 0 and m[i-1][j] == 0):
        d += 1
    if d % 4 == 0:
        j+=1
    elif d %4 == 1:
        i+=1
    elif d %4 == 2:
        j-=1
    elif d %4 == 3:
        i-=1

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