n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 7 |
6 | 112 |
7 | 1092 |
8 | 8400 |
9 | 56100 |
10 | 341088 |
11 | 1939938 |
12 | 10498488 |
13 | 54679625 |
14 | 276276000 |
15 | 1362040680 |
16 | 6580248480 |
17 | 31256180280 |
18 | 146350008000 |
19 | 676868787000 |
20 | 3097351569312 |
21 | 14042319855102 |
22 | 63144549413792 |
23 | 281895309883000 |
[0,0,0,0,7,112,1092,8400,56100,341088,1939938, 10498488,54679625,276276000,1362040680,6580248480, 31256180280,146350008000,676868787000, 3097351569312,14042319855102,63144549413792, 281895309883000] |