N = int(input())
if N == 1:
    print('001')
    exit()

A = [['' for i in range(N)] for j in range(N)]

i = 0

j = 0

k = 0

x = 1

while not A[i][j]:
    
    A[i][j] = str(x).zfill(3)
    x += 1
    if k == 0:
        if j < N - 1 and not A[i][j + 1]:
            j += 1
        else:
            i += 1
            k = 1
    elif k == 1:
        if i < N - 1 and not A[i + 1][j]:
            i += 1
        else:
            j -= 1
            k = 2
            
    elif k == 2:
        if j > 0 and not A[i][j - 1]:
            j -= 1
        
        else:
            i -= 1
            k = 3
    else:
        
        if i > 0 and not A[i - 1][j]:
            i -= 1
        else:
            j += 1
            k = 0
            
for a in A:
    
    print(*a)