n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 0 |
7 | 0 |
8 | 147456 |
9 | 3265920 |
10 | 129024000 |
11 | 1097712000 |
12 | 12939264000 |
13 | 66784798080 |
14 | 436483031040 |
15 | 1669619952000 |
16 | 7629571031040 |
17 | 23828156352000 |
18 | 85476013572096 |
19 | 230333593351680 |
20 | 693478195200000 |
21 | 1669577821632000 |
[0,0,0,0,0,0,0,147456,3265920,129024000, 1097712000,12939264000,66784798080,436483031040, 1669619952000,7629571031040,23828156352000, 85476013572096,230333593351680,693478195200000, 1669577821632000] |