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| n | a(n) |
|---|---|
| 1 | 268 |
| 2 | 1528 |
| 3 | 8688 |
| 4 | 49464 |
| 5 | 281580 |
| 6 | 1603344 |
| 7 | 9129276 |
| 8 | 51991032 |
| 9 | 296077680 |
| 10 | 1686409896 |
| 11 | 9605163060 |
| 12 | 54717521520 |
| 13 | 311695967268 |
| 14 | 1775889808968 |
| 15 | 10117725689808 |
| 16 | 57654052582296 |
| 17 | 328516960925484 |
| 18 | 1872258361831056 |
[268,1528,8688,49464,281580,1603344,9129276, 51991032,296077680,1686409896,9605163060, 54717521520,311695967268,1775889808968, 10117725689808,57654052582296,328516960925484, 1872258361831056] |