n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 3 |
6 | 9 |
7 | 23 |
8 | 51 |
9 | 307 |
10 | 2165 |
11 | 14201 |
12 | 97965 |
13 | 1157935 |
14 | 17853615 |
15 | 293568879 |
16 | 5611957605 |
17 | 149513863877 |
18 | 5116952638951 |
19 | 205718918489939 |
[1,1,1,1,3,9,23,51,307,2165,14201,97965,1157935, 17853615,293568879,5611957605,149513863877, 5116952638951,205718918489939] |