n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 2 |
4 | 9 |
5 | 24 |
6 | 110 |
7 | 720 |
8 | 5985 |
9 | 39200 |
10 | 343224 |
11 | 3628800 |
12 | 41295870 |
13 | 479001600 |
14 | 6130959120 |
15 | 87104969952 |
16 | 1318070979225 |
17 | 20922789888000 |
18 | 354344089779680 |
19 | 6402373705728000 |
20 | 121882240625961816 |
21 | 2432849766865689600 |
22 | 51041049953430700800 |
23 | 1124000727777607680000 |
[0,1,2,9,24,110,720,5985,39200,343224,3628800, 41295870,479001600,6130959120,87104969952, 1318070979225,20922789888000,354344089779680, 6402373705728000,121882240625961816, 2432849766865689600,51041049953430700800, 1124000727777607680000] |