n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 10 |
3 | 78 |
4 | 560 |
5 | 3880 |
6 | 26400 |
7 | 177632 |
8 | 1185280 |
9 | 7853184 |
10 | 51699200 |
11 | 338331136 |
12 | 2201948160 |
13 | 14258137088 |
14 | 91894620160 |
15 | 589744496640 |
16 | 3770069811200 |
17 | 24015941435392 |
18 | 152494553825280 |
19 | 965472423378944 |
20 | 6096346179174400 |
[0,1,10,78,560,3880,26400,177632,1185280,7853184, 51699200,338331136,2201948160,14258137088, 91894620160,589744496640,3770069811200, 24015941435392,152494553825280,965472423378944, 6096346179174400] |