n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 4 |
4 | 63 |
5 | 720 |
6 | 7254 |
7 | 68460 |
8 | 621315 |
9 | 5496208 |
10 | 47759130 |
11 | 409620156 |
12 | 3478672642 |
13 | 29315742924 |
14 | 245539064736 |
15 | 2046309441924 |
16 | 16983591315267 |
[0,0,4,63,720,7254,68460,621315,5496208,47759130, 409620156,3478672642,29315742924,245539064736, 2046309441924,16983591315267] |