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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 9 |
| 10 | 9 |
| 11 | 33 |
| 12 | 33 |
| 13 | 81 |
| 14 | 81 |
| 15 | 593 |
| 16 | 593 |
| 17 | 11281 |
| 18 | 11281 |
| 19 | 273235 |
| 20 | 273235 |
| 21 | 6759617 |
| 22 | 6759617 |
[1,1,1,1,1,1,1,1,9,9,33,33,81,81,593,593,11281, 11281,273235,273235,6759617,6759617] |