n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 36 |
4 | 144 |
5 | 3600 |
6 | 3600 |
7 | 176400 |
8 | 705600 |
9 | 6350400 |
10 | 31752000 |
11 | 3841992000 |
12 | 3841992000 |
13 | 649296648000 |
14 | 649296648000 |
15 | 129859329600 |
16 | 519437318400 |
17 | 150117385017600 |
18 | 150117385017600 |
19 | 54192375991353600 |
20 | 270961879956768000 |
[1,4,36,144,3600,3600,176400,705600,6350400, 31752000,3841992000,3841992000,649296648000, 649296648000,129859329600,519437318400, 150117385017600,150117385017600,54192375991353600, 270961879956768000] |