n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 72 |
4 | 240 |
5 | 7200 |
6 | 25200 |
7 | 1411200 |
8 | 5080320 |
9 | 457228800 |
10 | 1676505600 |
11 | 221298739200 |
12 | 821966745600 |
13 | 149597947699200 |
14 | 560992303872000 |
15 | 134638152929280000 |
16 | 508633022177280000 |
17 | 155641704786247680000 |
18 | 591438478187741184000 |
19 | 224746621711341649920000 |
[1,2,6,72,240,7200,25200,1411200,5080320, 457228800,1676505600,221298739200,821966745600, 149597947699200,560992303872000, 134638152929280000,508633022177280000, 155641704786247680000,591438478187741184000, 224746621711341649920000] |