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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 369 |
| 3 | 1369 |
| 4 | 5561 |
| 5 | 47687 |
| 6 | 293909 |
| 7 | 1670453 |
| 8 | 10788813 |
| 9 | 67448514 |
| 10 | 412320121 |
| 11 | 2569560534 |
| 12 | 15980293011 |
| 13 | 98911784172 |
| 14 | 613936175839 |
| 15 | 3811209605687 |
| 16 | 23637546172481 |
| 17 | 146658677530777 |
| 18 | 910039996197148 |
| 19 | 5645982820431326 |
[1,369,1369,5561,47687,293909,1670453,10788813, 67448514,412320121,2569560534,15980293011, 98911784172,613936175839,3811209605687, 23637546172481,146658677530777,910039996197148, 5645982820431326] |