n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 33792 |
5 | 2307376 |
6 | 38049764 |
7 | 316687056 |
8 | 1756247962 |
9 | 7430841848 |
10 | 25895095920 |
11 | 77947547416 |
12 | 209206118486 |
13 | 511919916960 |
14 | 1160763672124 |
15 | 2468985096704 |
16 | 4973232330258 |
17 | 9557709330856 |
18 | 17631022607048 |
19 | 31372223986440 |
20 | 54066152166478 |
21 | 90552261553040 |
[0,0,0,0,33792,2307376,38049764,316687056, 1756247962,7430841848,25895095920,77947547416, 209206118486,511919916960,1160763672124, 2468985096704,4973232330258,9557709330856, 17631022607048,31372223986440,54066152166478, 90552261553040] |