import numpy
n = int(input())
result = []

for i in range(n):
    tmp = []
    for j in range(n):
        tmp.append(0)
    result.append(tmp)

def right(array, begin, end, second, digit):
    for i in range(begin, end + 1):
        array[second][i] = digit
        digit += 1
    return digit

def down(array, begin, end, second, digit):
    for i in range(begin, end + 1):
        array[i][second] = digit
        digit += 1
    return digit

def left(array, begin, end, second, digit):
    for i in reversed(range(end, begin + 1)):
        array[second][i] = digit
        digit += 1
    return digit

def up(array, begin, end, second, digit):
    for i in reversed(range(end, begin+1)):
        array[i][second] = digit
        digit += 1
    return digit


digit = 1
second = 0
begin = 0
end = n - 1
while digit < n*n:
    digit = right(result, begin, end, second, digit)
    if digit > n**2:
        break
    digit = down(result, begin+1, end, end, digit)
    if digit > n**2:
        break
    digit = left(result, end - 1, begin, end, digit)
    if digit > n**2:
        break
    digit = up(result, end - 1, begin + 1, begin, digit)
    if digit > n**2:
        break
    second = begin + 1
    begin += 1
    end -= 1
    if(n %2==1):
        result[n//2][n//2] = n*n
if n == 1:
    print('1')
else:
    for i in range(n):
        tmp = " ".join([str(result[i][j]) for j in range(n)])
        print(tmp ,end='\n')