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| n | a(n) |
|---|---|
| 1 | 100 |
| 2 | 9999 |
| 3 | 999898 |
| 4 | 99989797 |
| 5 | 9998979696 |
| 6 | 999897969595 |
| 7 | 99989796959494 |
| 8 | 9998979695949393 |
| 9 | 999897969594939292 |
| 10 | 99989796959493929191 |
| 11 | 9998979695949392919090 |
| 12 | 999897969594939291908989 |
[100,9999,999898,99989797,9998979696,999897969595, 99989796959494,9998979695949393, 999897969594939292,99989796959493929191, 9998979695949392919090,999897969594939291908989] |