n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 5 |
4 | 10 |
5 | 56 |
6 | 178 |
7 | 1202 |
8 | 5296 |
9 | 42272 |
10 | 238816 |
11 | 2204480 |
12 | 15214480 |
13 | 159575936 |
14 | 1301989648 |
15 | 15299174672 |
16 | 144118832896 |
17 | 1875796977152 |
18 | 20040052293376 |
19 | 286222128454400 |
20 | 3419989086092800 |
21 | 53183132405282816 |
22 | 702831038438522368 |
[1,1,5,10,56,178,1202,5296,42272,238816,2204480, 15214480,159575936,1301989648,15299174672, 144118832896,1875796977152,20040052293376, 286222128454400,3419989086092800, 53183132405282816,702831038438522368] |