n | a(n) |
---|---|
0 | 1 |
1 | 20 |
2 | 1260 |
3 | 100100 |
4 | 8817900 |
5 | 823727520 |
6 | 79919739900 |
7 | 7962100660800 |
8 | 808906548235500 |
9 | 83426304143982800 |
10 | 8707404737345073760 |
11 | 917663774856743842200 |
12 | 97491279924241456098300 |
13 | 10427604345391237790688000 |
14 | 1121786259855036145008408000 |
[1,20,1260,100100,8817900,823727520,79919739900, 7962100660800,808906548235500,83426304143982800, 8707404737345073760,917663774856743842200, 97491279924241456098300, 10427604345391237790688000, 1121786259855036145008408000] |