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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 10000000000 |
| 3 | 20000000000 |
| 4 | 30000000000 |
| 5 | 40000000000 |
| 6 | 50000000000 |
| 7 | 60000000000 |
| 8 | 70000000000 |
| 9 | 80000000000 |
[0,10000000000,20000000000,30000000000, 40000000000,50000000000,60000000000,70000000000, 80000000000] |