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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 3 |
| 10 | 3 |
| 11 | 7 |
| 12 | 7 |
| 13 | 15 |
| 14 | 15 |
| 15 | 33 |
| 16 | 33 |
| 17 | 93 |
| 18 | 93 |
| 19 | 429 |
| 20 | 429 |
| 21 | 2069 |
| 22 | 2069 |
| 23 | 10289 |
| 24 | 10289 |
| 25 | 55429 |
| 26 | 55429 |
| 27 | 387995 |
| 28 | 387995 |
[1,1,1,1,1,1,1,1,3,3,7,7,15,15,33,33,93,93,429, 429,2069,2069,10289,10289,55429,55429,387995, 387995] |