from itertools import cycle
n = int(input())
l = [i for i in range(1, n)[::-1] for _ in [0] * 2]
m = [(i, j, k) for i, j, k in zip(cycle([0, 1, 0, -1]), cycle([1, 0, -1, 0]), [n-1]+l)]

q = [[str(1).zfill(3)] * n for _ in [0]*n]
cnt = 1
tmpi, tmpj = 0, 0

for i, j, k in m:
    for _ in [0]*(k):
        cnt += 1
        tmpi += i
        tmpj += j
        q[tmpi][tmpj] = str(cnt).zfill(3)

[print(*i) for i in q]