n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 6 |
6 | 60 |
7 | 120 |
8 | 1260 |
9 | 6720 |
10 | 90720 |
11 | 362880 |
12 | 9979200 |
13 | 39916800 |
14 | 1037836800 |
15 | 10897286400 |
16 | 163459296000 |
17 | 1307674368000 |
18 | 59281238016000 |
19 | 355687428096000 |
20 | 15205637551104000 |
21 | 202741834014720000 |
22 | 5109094217170944000 |
23 | 51090942171709440000 |
[1,1,1,3,6,60,120,1260,6720,90720,362880,9979200, 39916800,1037836800,10897286400,163459296000, 1307674368000,59281238016000,355687428096000, 15205637551104000,202741834014720000, 5109094217170944000,51090942171709440000] |