n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 24 |
5 | 100 |
6 | 1800 |
7 | 15435 |
8 | 702464 |
9 | 13716864 |
10 | 163296000 |
11 | 1383574500 |
12 | 109294479360 |
13 | 3842829083808 |
14 | 1159801183597056 |
15 | 132320316074821875 |
16 | 8213884352593920000 |
17 | 327816138093181337600 |
18 | 167079259535068179726336 |
19 | 34044607357920579594754944 |
[1,1,1,3,24,100,1800,15435,702464,13716864, 163296000,1383574500,109294479360,3842829083808, 1159801183597056,132320316074821875, 8213884352593920000,327816138093181337600, 167079259535068179726336, 34044607357920579594754944] |