import math

def fctrl(n):
    if n == 0:
        return 1
    else:
        a = 1
        for i in range(1, n+1):
            a = a*i
        return a

print(fctrl(9))

def pascal(n):
    arr = []
    for i in range(n+1):
        arr.append(int(fctrl(n)/(fctrl(i)*fctrl(n-i))))
    return arr

print(pascal(9))