from itertools import cycle

N = int(input())
a = [[1]*(N+2)] + [[1]+[0]*N+[1] for _ in [0]*N] + [[1]*(N+2)]

direction = cycle(((1, 0), (0, 1), (-1, 0), (0, -1)))
x, y, dirx, diry = 1, 1, 0, 0

for i in range(1, N**2+1):
    if a[y+diry][x+dirx] != 0:
        dirx, diry = next(direction)
    x, y = x+dirx, y+diry
    a[y][x] = "{:03d}".format(i)

for l in a[1:-1]:
    print(" ".join(l[1:-1]))