n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 120 |
6 | 600 |
7 | 3480 |
8 | 22800 |
9 | 164880 |
10 | 1285920 |
11 | 10516320 |
12 | 92931840 |
13 | 877374720 |
14 | 8762014080 |
15 | 91819440000 |
16 | 1005716908800 |
17 | 11584953158400 |
18 | 139521689740800 |
19 | 1748830512960000 |
20 | 22750446292531200 |
21 | 306931140411955200 |
22 | 4296645083802470400 |
23 | 62213458150660147200 |
[1,1,2,6,24,120,600,3480,22800,164880,1285920, 10516320,92931840,877374720,8762014080, 91819440000,1005716908800,11584953158400, 139521689740800,1748830512960000, 22750446292531200,306931140411955200, 4296645083802470400,62213458150660147200] |