n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 10 |
3 | 72 |
4 | 696 |
5 | 8400 |
6 | 121680 |
7 | 2056320 |
8 | 39715200 |
9 | 862928640 |
10 | 20832940800 |
11 | 553246848000 |
12 | 16027872537600 |
13 | 503031194265600 |
14 | 17001946241280000 |
15 | 615694938034176000 |
16 | 23782705115000832000 |
17 | 976080997055324160000 |
[1,2,10,72,696,8400,121680,2056320,39715200, 862928640,20832940800,553246848000,16027872537600, 503031194265600,17001946241280000, 615694938034176000,23782705115000832000, 976080997055324160000] |