n | a(n) |
---|---|
2 | 1 |
3 | 3 |
4 | 15 |
5 | 55 |
6 | 231 |
7 | 903 |
8 | 3655 |
9 | 14535 |
10 | 58311 |
11 | 232903 |
12 | 932295 |
13 | 3727815 |
14 | 14913991 |
15 | 59650503 |
16 | 238612935 |
17 | 954429895 |
18 | 3817763271 |
19 | 15270965703 |
20 | 61084037575 |
21 | 244335800775 |
22 | 977343902151 |
23 | 3909374210503 |
24 | 15637499638215 |
[1,3,15,55,231,903,3655,14535,58311,232903,932295, 3727815,14913991,59650503,238612935,954429895, 3817763271,15270965703,61084037575,244335800775, 977343902151,3909374210503,15637499638215] |