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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 49 |
| 3 | 280 |
| 4 | 1569 |
| 5 | 8752 |
| 6 | 48833 |
| 7 | 272976 |
| 8 | 1529441 |
| 9 | 8589176 |
| 10 | 48342449 |
| 11 | 272640680 |
| 12 | 1540495553 |
| 13 | 8718956768 |
| 14 | 49423735553 |
| 15 | 280551815456 |
| 16 | 1594568513857 |
| 17 | 9073566717800 |
| 18 | 51686272315569 |
| 19 | 294711466792120 |
| 20 | 1681938025818081 |
| 21 | 9606920311565328 |
| 22 | 54915241962566849 |
| 23 | 314131983462253680 |
[1,8,49,280,1569,8752,48833,272976,1529441, 8589176,48342449,272640680,1540495553,8718956768, 49423735553,280551815456,1594568513857, 9073566717800,51686272315569,294711466792120, 1681938025818081,9606920311565328, 54915241962566849,314131983462253680] |