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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 9 |
| 8 | 9 |
| 9 | 33 |
| 10 | 33 |
| 11 | 89 |
| 12 | 89 |
| 13 | 973 |
| 14 | 973 |
| 15 | 38577 |
| 16 | 38577 |
| 17 | 1078541 |
| 18 | 1078541 |
| 19 | 28644797 |
| 20 | 28644797 |
| 21 | 2049754535 |
| 22 | 2049754535 |
| 23 | 324959092887 |
| 24 | 324959092887 |
[1,1,1,1,1,1,9,9,33,33,89,89,973,973,38577,38577, 1078541,1078541,28644797,28644797,2049754535, 2049754535,324959092887,324959092887] |