n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 9 |
5 | 25 |
6 | 57 |
7 | 501 |
8 | 8327 |
9 | 120657 |
10 | 1392679 |
11 | 36251459 |
12 | 1768772831 |
13 | 102759395829 |
14 | 6127996773779 |
15 | 561420488133019 |
[1,1,1,9,25,57,501,8327,120657,1392679,36251459, 1768772831,102759395829,6127996773779, 561420488133019] |