n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 48 |
5 | 360 |
6 | 4320 |
7 | 60480 |
8 | 1008000 |
9 | 18869760 |
10 | 410054400 |
11 | 9859449600 |
12 | 262492876800 |
13 | 7634327500800 |
14 | 241483866624000 |
15 | 8237040844032000 |
16 | 301832166924288000 |
17 | 11812023799640064000 |
18 | 492028821658902528000 |
19 | 21728004544824754176000 |
20 | 1014150336304416030720000 |
[0,1,2,6,48,360,4320,60480,1008000,18869760, 410054400,9859449600,262492876800,7634327500800, 241483866624000,8237040844032000, 301832166924288000,11812023799640064000, 492028821658902528000,21728004544824754176000, 1014150336304416030720000] |