n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 24 |
5 | 120 |
6 | 720 |
7 | 5040 |
8 | 80640 |
9 | 1088640 |
10 | 14515200 |
11 | 199584000 |
12 | 3353011200 |
13 | 62270208000 |
14 | 1220496076800 |
15 | 24845812992000 |
16 | 543992537088000 |
17 | 12804747411456000 |
18 | 320118685286400000 |
19 | 8393511928209408000 |
[1,0,0,0,24,120,720,5040,80640,1088640,14515200, 199584000,3353011200,62270208000,1220496076800, 24845812992000,543992537088000,12804747411456000, 320118685286400000,8393511928209408000] |