n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 6 |
4 | 5 |
5 | 28 |
6 | 630 |
7 | 396 |
8 | 9009 |
9 | 24024 |
10 | 87516 |
11 | 1511640 |
12 | 5819814 |
13 | 4576264 |
14 | 106234700 |
15 | 1147334760 |
16 | 1890494775 |
17 | 11031593040 |
18 | 343817983080 |
19 | 292314884400 |
20 | 10274868186660 |
[1,1,6,5,28,630,396,9009,24024,87516,1511640, 5819814,4576264,106234700,1147334760,1890494775, 11031593040,343817983080,292314884400, 10274868186660] |