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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 98 |
| 3 | 987 |
| 4 | 9876 |
| 5 | 98765 |
| 6 | 987654 |
| 7 | 9876543 |
| 8 | 98765432 |
| 9 | 987654320 |
| 10 | 9876543209 |
| 11 | 98765432098 |
| 12 | 987654320987 |
| 13 | 9876543209876 |
| 14 | 98765432098765 |
| 15 | 987654320987654 |
| 16 | 9876543209876543 |
| 17 | 98765432098765432 |
| 18 | 987654320987654320 |
[9,98,987,9876,98765,987654,9876543,98765432, 987654320,9876543209,98765432098,987654320987, 9876543209876,98765432098765,987654320987654, 9876543209876543,98765432098765432, 987654320987654320] |