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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 6 |
| 3 | 60 |
| 4 | 640 |
| 5 | 6239 |
| 6 | 60228 |
| 7 | 600196 |
| 8 | 6000213 |
| 9 | 60000231 |
| 10 | 600000239 |
| 11 | 6000000240 |
[0,6,60,640,6239,60228,600196,6000213,60000231, 600000239,6000000240] |