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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 81 |
| 3 | 18966025 |
| 4 | 135187129 |
| 5 | 164275489 |
| 6 | 350561925 |
| 7 | 445421025 |
| 8 | 598047025 |
| 9 | 649587169 |
| 10 | 748733769 |
| 11 | 850830561 |
| 12 | 960362325 |
| 13 | 1055925025 |
| 14 | 1341097641 |
| 15 | 1406175001 |
| 16 | 1476326929 |
| 17 | 1520766009 |
| 18 | 1536248025 |
| 19 | 1591004025 |
| 20 | 1735566525 |
[1,81,18966025,135187129,164275489,350561925, 445421025,598047025,649587169,748733769,850830561, 960362325,1055925025,1341097641,1406175001, 1476326929,1520766009,1536248025,1591004025, 1735566525] |