TASK_08

def show_palindrome(value):
    result = []
    limit = value
    limit /= 2
    limit = int(limit)
    for i in range(1, value + 1):
        result.append(i)
    for i in range(value - 1, 0, -1):
        result.append(i)
    return result


def show_palindromic_triangle(num):
    counter = 1
    for i in range(0, num):
        for i in range(0, num - counter):
            print(" ", end=" ")
        result = show_palindrome(counter)
        for i in result:
            print(i, end=" ")
        counter += 1
        print()


value = input()
value = int(value)
show_palindromic_triangle(value)