n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 10 |
3 | 54 |
4 | 224 |
5 | 800 |
6 | 2592 |
7 | 7840 |
8 | 22528 |
9 | 62208 |
10 | 166400 |
11 | 433664 |
12 | 1105920 |
13 | 2768896 |
14 | 6823936 |
15 | 16588800 |
16 | 39845888 |
17 | 94699520 |
18 | 222953472 |
19 | 520486912 |
20 | 1205862400 |
21 | 2774532096 |
22 | 6343884800 |
23 | 14422114304 |
24 | 32614907904 |
25 | 73400320000 |
[0,1,10,54,224,800,2592,7840,22528,62208,166400, 433664,1105920,2768896,6823936,16588800,39845888, 94699520,222953472,520486912,1205862400, 2774532096,6343884800,14422114304,32614907904, 73400320000] |