n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 3 |
3 | 8 |
4 | 45 |
5 | 288 |
6 | 140 |
7 | 17280 |
8 | 14175 |
9 | 89600 |
10 | 299376 |
11 | 17418240 |
12 | 5255250 |
13 | 402361344000 |
14 | 2501928000 |
15 | 98402304 |
16 | 488462349375 |
17 | 342372925440000 |
18 | 2534852320000 |
19 | 5377993912811520000 |
20 | 4842604238472 |
21 | 29967718809600000 |
[1,2,3,8,45,288,140,17280,14175,89600,299376, 17418240,5255250,402361344000,2501928000,98402304, 488462349375,342372925440000,2534852320000, 5377993912811520000,4842604238472, 29967718809600000] |