n = int(input())
a = [[0 for i in range(n)] for j in range(n)]


def numk(n, k):
    return k if k <= n else 2 * n - k


def loc(n, k, l):
    if k <= n:
        i, j = 0, n - k
    else:
        i, j = k - n, 0
    return i + l - 1, j + l - 1


for k in range(1, 2 * n):
    if k % 2 == 0:
        for l in range(1, 1 + numk(n, k)):
            i, j = loc(n, k, l)
            if l == 1:
                i2, j2 = loc(n, k - 1, 1)
            else:
                i2, j2 = loc(n, k, l - 1)
            a[i][j] = a[i2][j2] + 1
    else:
        for l in range(numk(n, k), 0, -1):
            i, j = loc(n, k, l)
            if k == 1:
                a[i][j] = 1
            else:
                if l == numk(n, k):
                    i2, j2 = loc(n, k - 1, numk(n, k - 1))
                else:
                    i2, j2 = loc(n, k, l + 1)
                a[i][j] = a[i2][j2] + 1

for i in range(n):
    for j in range(n):
        print(a[i][j], end=" ")
    print()