n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 1 |
7 | 1 |
8 | 15 |
9 | 35 |
10 | 63 |
11 | 133 |
12 | 361 |
13 | 1225 |
14 | 3603 |
15 | 14173 |
16 | 68577 |
17 | 327107 |
18 | 1804859 |
19 | 9535581 |
20 | 56798795 |
21 | 377223653 |
[1,1,1,1,1,1,1,15,35,63,133,361,1225,3603,14173, 68577,327107,1804859,9535581,56798795,377223653] |