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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 9 |
| 8 | 5 |
| 9 | 29 |
| 10 | 17 |
| 11 | 313 |
| 12 | 37 |
| 13 | 1657 |
| 14 | 109 |
| 15 | 19905 |
| 16 | 2661 |
| 17 | 319705 |
| 18 | 46501 |
| 19 | 11762329 |
| 20 | 480069 |
| 21 | 357135757 |
| 22 | 5729689 |
| 23 | 14191646903 |
| 24 | 346242155 |
| 25 | 884769592659 |
| 26 | 24356919567 |
[1,1,1,1,1,1,9,5,29,17,313,37,1657,109,19905,2661, 319705,46501,11762329,480069,357135757,5729689, 14191646903,346242155,884769592659,24356919567] |