n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 6 |
4 | 48 |
5 | 840 |
6 | 17280 |
7 | 448560 |
8 | 13789440 |
9 | 491702400 |
10 | 19929369600 |
11 | 904873939200 |
12 | 45486949939200 |
13 | 2507639957222400 |
14 | 150419515915468800 |
15 | 9752720435377920000 |
16 | 679630757528346624000 |
17 | 50655177765863903232000 |
[0,0,0,6,48,840,17280,448560,13789440,491702400, 19929369600,904873939200,45486949939200, 2507639957222400,150419515915468800, 9752720435377920000,679630757528346624000, 50655177765863903232000] |