n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 8 |
5 | 36 |
6 | 174 |
7 | 1104 |
8 | 7440 |
9 | 62640 |
10 | 545040 |
11 | 5649840 |
12 | 60681600 |
13 | 748621440 |
14 | 9518342400 |
15 | 136758585600 |
16 | 2009451628800 |
17 | 32848492723200 |
18 | 549241915622400 |
19 | 10066913176320000 |
20 | 188293339922688000 |
21 | 3832031198451456000 |
22 | 79291640831090688000 |
23 | 1771146970953744384000 |
[1,1,1,3,8,36,174,1104,7440,62640,545040,5649840, 60681600,748621440,9518342400,136758585600, 2009451628800,32848492723200,549241915622400, 10066913176320000,188293339922688000, 3832031198451456000,79291640831090688000, 1771146970953744384000] |