n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 3 |
4 | 12 |
5 | 40 |
6 | 240 |
7 | 1260 |
8 | 10080 |
9 | 72576 |
10 | 725760 |
11 | 6652800 |
12 | 79833600 |
13 | 889574400 |
14 | 12454041600 |
15 | 163459296000 |
16 | 2615348736000 |
17 | 39520825344000 |
18 | 711374856192000 |
19 | 12164510040883200 |
20 | 243290200817664000 |
21 | 4644631106519040000 |
22 | 102181884343418880000 |
23 | 2154334728240414720000 |
[1,2,3,12,40,240,1260,10080,72576,725760,6652800, 79833600,889574400,12454041600,163459296000, 2615348736000,39520825344000,711374856192000, 12164510040883200,243290200817664000, 4644631106519040000,102181884343418880000, 2154334728240414720000] |