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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 13 |
| 4 | 89 |
| 5 | 341 |
| 6 | 2653 |
| 7 | 13021 |
| 8 | 110449 |
| 9 | 648469 |
| 10 | 5891381 |
| 11 | 39734685 |
| 12 | 382729801 |
| 13 | 2887493077 |
| 14 | 29287115341 |
| 15 | 242592910621 |
| 16 | 2577978650081 |
| 17 | 23125601566165 |
| 18 | 256460946182821 |
| 19 | 2465492129670493 |
| 20 | 28441473938165561 |
| 21 | 290630718826209301 |
| 22 | 3477967327342044989 |
| 23 | 37528922270996471133 |
[1,1,5,13,89,341,2653,13021,110449,648469,5891381, 39734685,382729801,2887493077,29287115341, 242592910621,2577978650081,23125601566165, 256460946182821,2465492129670493, 28441473938165561,290630718826209301, 3477967327342044989,37528922270996471133] |