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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 216 |
| 3 | 3641 |
| 4 | 51588 |
| 5 | 755110 |
| 6 | 11244900 |
| 7 | 166636876 |
| 8 | 2469362361 |
| 9 | 36605480121 |
| 10 | 542613705373 |
| 11 | 8043171525193 |
| 12 | 119225577452598 |
| 13 | 1767306016173071 |
| 14 | 26197124073681397 |
| 15 | 388325253441016576 |
| 16 | 5756224415206983972 |
[3,216,3641,51588,755110,11244900,166636876, 2469362361,36605480121,542613705373,8043171525193, 119225577452598,1767306016173071, 26197124073681397,388325253441016576, 5756224415206983972] |