num = int(input())

arr = []

for i in range(num):
    arr.append([])
    for j in range(num):
        arr[i].append([])

check = 1

for i in range(num-1,-1,-1):
    x = 0
    y = i
    while y != num:
        arr[x][y] = check
        check += 1
        y += 1
        x += 1

for i in range(1,num,1):
    x = i
    y = 0
    while x != num:
        arr[x][y] = check
        check += 1
        y += 1
        x += 1

string = ''

for i in range(num):
    for j in range(num):
        string += (str(arr[i][j]) + ' ')
    print(string)
    string = ''