n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 1 |
7 | 9 |
8 | 17 |
9 | 43 |
10 | 77 |
11 | 187 |
12 | 693 |
13 | 2641 |
14 | 10331 |
15 | 50859 |
16 | 230621 |
17 | 1381217 |
18 | 7944835 |
19 | 57500635 |
20 | 415589871 |
21 | 3698671025 |
[1,1,1,1,1,1,9,17,43,77,187,693,2641,10331,50859, 230621,1381217,7944835,57500635,415589871, 3698671025] |