n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 0 |
7 | 0 |
8 | 1 |
9 | 80 |
10 | 1944 |
11 | 25200 |
12 | 217800 |
13 | 1411344 |
14 | 7361640 |
15 | 32391216 |
16 | 124227675 |
17 | 425339200 |
18 | 1323786464 |
19 | 3797876160 |
20 | 10155802176 |
21 | 25539739200 |
22 | 60844672800 |
23 | 138154965696 |
24 | 300509773245 |
25 | 628886888784 |
26 | 1270898695000 |
27 | 2488029830000 |
28 | 4731583685400 |
29 | 8762192010000 |
[0,0,0,0,0,0,0,1,80,1944,25200,217800,1411344, 7361640,32391216,124227675,425339200,1323786464, 3797876160,10155802176,25539739200,60844672800, 138154965696,300509773245,628886888784, 1270898695000,2488029830000,4731583685400, 8762192010000] |