n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 720 |
7 | 15120 |
8 | 231840 |
9 | 3265920 |
10 | 45556560 |
11 | 649479600 |
12 | 9604465200 |
13 | 148370508000 |
14 | 2402005525920 |
15 | 40797624067200 |
16 | 726963917097600 |
17 | 13580328282393600 |
18 | 265689107448756480 |
19 | 5437099866285377280 |
20 | 116229410301685651200 |
21 | 2591985252922277184000 |
22 | 60218914823672258142720 |
[0,0,0,0,0,0,720,15120,231840,3265920,45556560, 649479600,9604465200,148370508000,2402005525920, 40797624067200,726963917097600,13580328282393600, 265689107448756480,5437099866285377280, 116229410301685651200,2591985252922277184000, 60218914823672258142720] |