n = int(input())
grid = [[0] * (n + 2) for _ in range(n + 2)]

for i in range(n + 2):
    grid[0][i] = 1
    grid[n + 1][i] = 1
    grid[i][0] = 1
    grid[i][n + 1] = 1
    
x = 0
y = 1
dx = 1
dy = 0
nex = {(0, 1):(1, 0), (1, 0):(0, -1), (0, -1):(-1, 0), (-1, 0):(0, 1)}
for m in range(1, n * n + 1):
    x += dx
    y += dy
    if grid[y][x] != 0:
        x -= dx
        y -= dy
        dy, dx = nex[(dy, dx)]
        x += dx
        y += dy
    grid[y][x] = str(m).zfill(3)
    
for row in grid[1:-1]:
    print(*row[1:-1])