n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 3 |
4 | 24 |
5 | 15 |
6 | 720 |
7 | 180 |
8 | 5760 |
9 | 6480 |
10 | 518400 |
11 | 1425600 |
12 | 68428800 |
13 | 27799200 |
14 | 1779148800 |
15 | 6671808000 |
16 | 426995712000 |
17 | 907365888000 |
18 | 130660687872000 |
19 | 620638267392000 |
20 | 49651061391360000 |
21 | 9309574010880000 |
22 | 3276970051829760000 |
[1,1,2,3,24,15,720,180,5760,6480,518400,1425600, 68428800,27799200,1779148800,6671808000, 426995712000,907365888000,130660687872000, 620638267392000,49651061391360000, 9309574010880000,3276970051829760000] |