n | a(n) |
---|---|
0 | 1 |
1 | 28 |
2 | 560 |
3 | 10080 |
4 | 176400 |
5 | 3104640 |
6 | 55883520 |
7 | 1037836800 |
8 | 19978358400 |
9 | 399567168000 |
10 | 8310997094400 |
11 | 179819755315200 |
12 | 4045944494592000 |
13 | 94612855873536000 |
14 | 2297740785500160000 |
15 | 57903067794604032000 |
[1,28,560,10080,176400,3104640,55883520, 1037836800,19978358400,399567168000,8310997094400, 179819755315200,4045944494592000, 94612855873536000,2297740785500160000, 57903067794604032000] |