n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 28 |
5 | 320 |
6 | 5360 |
7 | 123760 |
8 | 3765440 |
9 | 145951680 |
10 | 7019678400 |
11 | 410164339200 |
12 | 28615175635200 |
13 | 2349290700556800 |
14 | 224201377681881600 |
15 | 24610071925350912000 |
16 | 3078761402543963136000 |
17 | 435446399655217606656000 |
[1,1,4,28,320,5360,123760,3765440,145951680, 7019678400,410164339200,28615175635200, 2349290700556800,224201377681881600, 24610071925350912000,3078761402543963136000, 435446399655217606656000] |