Triangle - Recursion

def print_numbers(curr_num):
    if curr_num == 0:
        return
    print_numbers(curr_num - 1)
    print(curr_num, end="")


def print_pattern(n, curr_num=1):
    print_numbers(curr_num)
    print()
    if curr_num < n:
        print_pattern(n, curr_num + 1)

    if curr_num > 1:
        print_numbers(curr_num - 1)
        print()


n = int(input())
print_pattern(n)