m = int(input())
n = m * m
a = [[0] * m for i in range(m)]

cur = 1
yoko = m
tate = m
x = 0
y = 0
while True:
    # 左から右
    for i in range(yoko):
        a[y][x] = cur
        x += 1
        cur += 1
    tate -= 1
    x -= 1
    y += 1

    if cur == n+1:
        break
    # 上から下
    for i in range(tate):
        a[y][x] = cur
        y += 1
        cur += 1
    yoko -= 1
    y -= 1
    x -= 1 

    if cur == n+1:
        break
    # 右から左
    for i in range(yoko):
        a[y][x] = cur
        x -= 1
        cur += 1
    tate -= 1
    x += 1
    y -= 1

    if cur == n+1:
        break
    # 下から上
    for i in range(tate):
        a[y][x] = cur
        y -= 1
        cur += 1
    yoko -= 1
    y += 1
    x += 1

    if cur == n+1:
        break

res = []
for i in range(m):
    for j in range(m):
        str_number = str(a[i][j])
        if len(str_number) == 1:
            res.append('00' + str_number)
        elif len(str_number) == 2:
            res.append('0' + str_number)
        else:
            res.append(str_number)
        
for i in range(n):
    if i != 0 and i % m == 0:
        print()
    if i % m == m-1:
        print(res[i], end='')
    else:
        print(res[i] + ' ', end='')