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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 81 |
| 3 | 625 |
| 4 | 2401 |
| 5 | 83521 |
| 6 | 923521 |
| 7 | 7890481 |
| 8 | 88529281 |
| 9 | 895745041 |
| 10 | 9597924961 |
| 11 | 96254442001 |
| 12 | 988053892081 |
| 13 | 9971252437441 |
| 14 | 96840734511361 |
| 15 | 999706081460641 |
| 16 | 9892436613211441 |
| 17 | 99510671548640641 |
| 18 | 998005893107997601 |
[0,81,625,2401,83521,923521,7890481,88529281, 895745041,9597924961,96254442001,988053892081, 9971252437441,96840734511361,999706081460641, 9892436613211441,99510671548640641, 998005893107997601] |