# Recursive Table of Factorials
# Neal Nelson 2007.10.07

def fact(n):
  if (n == 0): return 1
  else: return n * fact(n-1)

def factTable(n):
# print a table of factorials from 0 to n
  for i in range(n+1):
    print i, fact(i)

def main():
  n = input("Enter a positive integer: ")
  if (n < 0): print "Enter only positive integers"
  else: factTable(n)

main()