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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 441 |
| 3 | 5917 |
| 4 | 95299 |
| 5 | 1507355 |
| 6 | 23471595 |
| 7 | 368714705 |
| 8 | 5782895827 |
| 9 | 90654802423 |
| 10 | 1421716453961 |
| 11 | 22294076155075 |
| 12 | 349592218477051 |
| 13 | 5482034564500123 |
| 14 | 85964497396238357 |
| 15 | 1348020724029962565 |
| 16 | 21138507798707438087 |
[21,441,5917,95299,1507355,23471595,368714705, 5782895827,90654802423,1421716453961, 22294076155075,349592218477051,5482034564500123, 85964497396238357,1348020724029962565, 21138507798707438087] |