N = int(input())
ans = [[0] * (N) for _ in range(N)]

for n in range(1, N + 1):
    i, j = 0, 2*(n - 1)%N
    for _ in range(N):
        ans[i][j] = n
        i += 1
        j = (j - 1)%N

for a in ans:
    print(*a)