n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 12 |
4 | 48 |
5 | 360 |
6 | 2160 |
7 | 25200 |
8 | 201600 |
9 | 2540160 |
10 | 25401600 |
11 | 399168000 |
12 | 4790016000 |
13 | 80951270400 |
14 | 1133317785600 |
15 | 23538138624000 |
16 | 376610217984000 |
17 | 8180810846208000 |
18 | 147254595231744000 |
19 | 3649353012264960000 |
[0,1,2,12,48,360,2160,25200,201600,2540160, 25401600,399168000,4790016000,80951270400, 1133317785600,23538138624000,376610217984000, 8180810846208000,147254595231744000, 3649353012264960000] |