Pascal Triangle 

1                      
1 1 0 0 0 0 0 0 0 0 0 0
1 2 1 0 0 0 0 0 0 0 0 0
1 3 3 1 0 0 0 0 0 0 0 0
1 4 6 4 1 0 0 0 0 0 0 0
1 5 10 10 5 1 0 0 0 0 0 0
1 6 15 20 15 6 1 0 0 0 0 0
1 7 21 35 35 21 7 1 0 0 0 0
1 8 28 56 70 56 28 8 1 0 0 0
1 9 36 84 126 126 84 36 9 1 0 0
1 10 45 120 210 252 210 120 45 10 1 0
1 11 55 165 330 462 462 330 165 55 11 1


The binomial coefficients satisfy