n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 8 |
5 | 120 |
6 | 80 |
7 | 5040 |
8 | 13440 |
9 | 362880 |
10 | 1209600 |
11 | 39916800 |
12 | 53222400 |
13 | 566092800 |
14 | 29059430400 |
15 | 1307674368000 |
16 | 6974263296000 |
17 | 355687428096000 |
18 | 237124952064000 |
19 | 121645100408832000 |
20 | 73724303278080000 |
21 | 51090942171709440000 |
22 | 19719311013642240000 |
[1,1,2,6,8,120,80,5040,13440,362880,1209600, 39916800,53222400,566092800,29059430400, 1307674368000,6974263296000,355687428096000, 237124952064000,121645100408832000, 73724303278080000,51090942171709440000, 19719311013642240000] |