n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 2 |
3 | 12 |
4 | 168 |
5 | 3120 |
6 | 75600 |
7 | 2237760 |
8 | 78382080 |
9 | 3169393920 |
10 | 145297152000 |
11 | 7446479040000 |
12 | 421880659200000 |
13 | 26181558769766400 |
14 | 1766275594501017600 |
15 | 128700516232544256000 |
16 | 10073126652104355840000 |
[0,0,2,12,168,3120,75600,2237760,78382080, 3169393920,145297152000,7446479040000, 421880659200000,26181558769766400, 1766275594501017600,128700516232544256000, 10073126652104355840000] |