1       0       0       0       0       0       0       0       0
        1       1       0       0       0       0       0       0       0
        1       2       1       0       0       0       0       0       0
        1       3       3       1       0       0       0       0       0
        1       4       6       4       1       0       0       0       0
        1       5       10      10      5       1       0       0       0
        1       6       15      20      15      6       1       0       0
        1       7       21      35      35      21      7       1       0
        1       8       28      56      70      56      28      8       1