n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 2 |
6 | 12 |
7 | 12 |
8 | 48 |
9 | 144 |
10 | 1440 |
11 | 1440 |
12 | 17280 |
13 | 17280 |
14 | 241920 |
15 | 3628800 |
16 | 29030400 |
17 | 29030400 |
18 | 522547200 |
19 | 522547200 |
20 | 10450944000 |
21 | 219469824000 |
22 | 4828336128000 |
23 | 4828336128000 |
24 | 115880067072000 |
25 | 579400335360000 |
26 | 15064408719360000 |
[1,1,1,2,2,12,12,48,144,1440,1440,17280,17280, 241920,3628800,29030400,29030400,522547200, 522547200,10450944000,219469824000,4828336128000, 4828336128000,115880067072000,579400335360000, 15064408719360000] |