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| n | a(n) |
|---|---|
| 6 | 1 |
| 7 | 7 |
| 8 | 43 |
| 9 | 215 |
| 10 | 1073 |
| 11 | 5058 |
| 12 | 23953 |
| 13 | 112217 |
| 14 | 530779 |
| 15 | 2506867 |
| 16 | 11965685 |
| 17 | 57344884 |
| 18 | 277801349 |
| 19 | 1354273789 |
| 20 | 6670778019 |
| 21 | 33102793363 |
| 22 | 165896192078 |
| 23 | 837960354362 |
| 24 | 4272278074880 |
| 25 | 21954732604289 |
| 26 | 113823300476914 |
| 27 | 594723866847085 |
| 28 | 3133570169932798 |
| 29 | 16636300212628344 |
[1,7,43,215,1073,5058,23953,112217,530779,2506867, 11965685,57344884,277801349,1354273789,6670778019, 33102793363,165896192078,837960354362, 4272278074880,21954732604289,113823300476914, 594723866847085,3133570169932798, 16636300212628344] |