# Iterative Table of Factorials
# Neal Nelson  2007.10.07

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

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

main()