n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 10 |
6 | 120 |
7 | 105 |
8 | 336 |
9 | 2268 |
10 | 15120 |
11 | 332640 |
12 | 498960 |
13 | 6486480 |
14 | 43243200 |
15 | 259459200 |
16 | 3113510400 |
17 | 35286451200 |
18 | 1270312243200 |
19 | 3016991577600 |
20 | 60339831552000 |
21 | 1267136462592000 |
22 | 37169336236032000 |
23 | 160292762517888000 |
[1,1,1,1,3,10,120,105,336,2268,15120,332640, 498960,6486480,43243200,259459200,3113510400, 35286451200,1270312243200,3016991577600, 60339831552000,1267136462592000,37169336236032000, 160292762517888000] |