n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 9 |
6 | 13 |
7 | 35 |
8 | 63 |
9 | 1723 |
10 | 4113 |
11 | 139447 |
12 | 424285 |
13 | 17547037 |
14 | 65696265 |
15 | 8305366965 |
16 | 39548747551 |
17 | 8986486324279 |
18 | 53849970214263 |
19 | 23104370746283843 |
20 | 173734005704827315 |
[1,1,1,1,9,13,35,63,1723,4113,139447,424285, 17547037,65696265,8305366965,39548747551, 8986486324279,53849970214263,23104370746283843, 173734005704827315] |