def show(matrix, height, width):
    for row in range(height):
        for col in range(width):
            print str(matrix[row, col]).rjust(3),
        print
    print "-----------"

import random

size = int(raw_input("Size: "))

m = {}

for row in range(size):
    for col in range(size):
        m[row, col] = 0

show(m, size, size)

k = 1
row = size - 1
col = size/2
m[row, col] = k
k = k + 1
while k <= size * size:
    i = (row + 1) % size
    j = (col + 1) % size
    if m[i, j] == 0:
        row = i
        col = j
    else:
        row = row - 1
        col = col
    m[row, col] = k
    k = k + 1
    show(m, size, size)