n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 8 |
3 | 35 |
4 | 160 |
5 | 752 |
6 | 3605 |
7 | 17544 |
8 | 86400 |
9 | 429605 |
10 | 2153008 |
11 | 10860720 |
12 | 55086421 |
13 | 280692440 |
14 | 1435868960 |
15 | 7369703660 |
16 | 37934443008 |
17 | 195748568256 |
18 | 1012292239955 |
19 | 5244933087000 |
20 | 27220980100160 |
21 | 141486701601630 |
22 | 736387364237280 |
23 | 3837221866576800 |
24 | 20016901815607125 |
[1,2,8,35,160,752,3605,17544,86400,429605,2153008, 10860720,55086421,280692440,1435868960,7369703660, 37934443008,195748568256,1012292239955, 5244933087000,27220980100160,141486701601630, 736387364237280,3837221866576800, 20016901815607125] |