| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 5 |
| 10 | 5 |
| 11 | 17 |
| 12 | 17 |
| 13 | 39 |
| 14 | 39 |
| 15 | 155 |
| 16 | 155 |
| 17 | 1391 |
| 18 | 1391 |
| 19 | 19355 |
| 20 | 19355 |
| 21 | 265987 |
| 22 | 265987 |
| 23 | 4290113 |
| 24 | 4290113 |
| 25 | 107056079 |
| 26 | 107056079 |
[1,1,1,1,1,1,1,1,5,5,17,17,39,39,155,155,1391, 1391,19355,19355,265987,265987,4290113,4290113, 107056079,107056079] |