N = int(input())
res = [[0 for j in range(N)] for i in range(N)]
res[0][0] = 1
for j in range(1, N):
    res[0][j] = (res[0][j - 1] - 2) % N + 1
for j in range(N):
    for i in range(1, N):
        res[i][j] = (res[i - 1][j] + 1) % N + 1
for r in res:
    print(*r)