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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 2025 |
| 3 | 3025 |
| 4 | 9801 |
| 5 | 494209 |
| 6 | 998001 |
| 7 | 24502500 |
| 8 | 25502500 |
| 9 | 52881984 |
| 10 | 60481729 |
| 11 | 99980001 |
| 12 | 6049417284 |
| 13 | 6832014336 |
| 14 | 9048004641 |
| 15 | 9999800001 |
| 16 | 101558217124 |
| 17 | 108878221089 |
| 18 | 123448227904 |
| 19 | 127194229449 |
| 20 | 152344237969 |
| 21 | 213018248521 |
| 22 | 217930248900 |
| 23 | 249500250000 |
| 24 | 250500250000 |
[81,2025,3025,9801,494209,998001,24502500, 25502500,52881984,60481729,99980001,6049417284, 6832014336,9048004641,9999800001,101558217124, 108878221089,123448227904,127194229449, 152344237969,213018248521,217930248900, 249500250000,250500250000] |