n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 2 |
4 | 24 |
5 | 40 |
6 | 144 |
7 | 5040 |
8 | 40320 |
9 | 6048 |
10 | 6048 |
11 | 19958400 |
12 | 53222400 |
13 | 53222400 |
14 | 87178291200 |
15 | 118879488000 |
16 | 5230697472000 |
17 | 8083805184000 |
18 | 3201186852864000 |
19 | 40548366802944000 |
20 | 2432902008176640000 |
21 | 17030314057236480000 |
[1,2,2,24,40,144,5040,40320,6048,6048,19958400, 53222400,53222400,87178291200,118879488000, 5230697472000,8083805184000,3201186852864000, 40548366802944000,2432902008176640000, 17030314057236480000] |