m C(20,m)
0 1
1 20
2 190
3 1140
4 4845
5 15504
6 38760
7 77520
8 125970
9 167960
10 184756
11 167960
12 125970
13 77520
14 38760
15 15504
16 4845
17 1140
18 190
19 20
20 1
To make the "m" column, I first typed the "0", then in the next box down typed "=1+A4", and hit enter. Then after selecting and copying the A5 box, I selected a long column below A5 and hit paste.

To make the C(20,m) column I used the COMBIN(N,M) function. I typed "=COMBIN(20,A4)" in the B4 Box, and
then again copied that, selected B5:B24, and did a paste.

Finally, I selected the coefficients and used the "Chart Wizard" to make the plot. I set the A4:A24 column as the X labels.