n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 8 |
3 | 36 |
4 | 200 |
5 | 1220 |
6 | 7896 |
7 | 53220 |
8 | 369528 |
9 | 2624772 |
10 | 18981864 |
11 | 139287588 |
12 | 1034475624 |
13 | 7761249476 |
14 | 58735359032 |
15 | 447827171556 |
16 | 3436759851672 |
17 | 26526255859716 |
18 | 205782644595912 |
19 | 1603655203428900 |
20 | 12548225647402248 |
21 | 98548826076070596 |
22 | 776552629964300952 |
[1,3,8,36,200,1220,7896,53220,369528,2624772, 18981864,139287588,1034475624,7761249476, 58735359032,447827171556,3436759851672, 26526255859716,205782644595912,1603655203428900, 12548225647402248,98548826076070596, 776552629964300952] |