n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 24 |
5 | 240 |
6 | 4320 |
7 | 146880 |
8 | 9694080 |
9 | 1260230400 |
10 | 325139443200 |
11 | 167121673804800 |
12 | 171466837323724800 |
13 | 351507016513635840000 |
14 | 1440475753672879672320000 |
15 | 11803258325595576034990080000 |
[1,1,4,24,240,4320,146880,9694080,1260230400, 325139443200,167121673804800,171466837323724800, 351507016513635840000,1440475753672879672320000, 11803258325595576034990080000] |