The Combination pyramid.

In combination we know that nCr=n!/{(n-r)!*r!} for first ten nmbers can be written as:

for n=2                                                          1          2        1

for n=3                                                     1         3         3          1

for n=4                                                1        4          6          4          1

for n=5                                             1       5        10       10          5         1

for n=6                                          1      6        15       20       15        6        1

for n=7                                     1       7       21           35              21         7       1

for n=8                                 1       8       28       56     70     56       28          8       1

for n=9                            1        9      36      84     126     126         84            9         1 

for n=10                        1      10       45     210      252      210           45          10        1