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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 12 |
| 3 | 108 |
| 4 | 1072 |
| 5 | 10000 |
| 6 | 108000 |
| 7 | 1666000 |
| 8 | 10000000 |
| 9 | 810000000 |
| 10 | 1000000000 |
| 11 | 73810000000 |
| 12 | 873810000000 |
| 13 | 0 |
| 14 | 0 |
| 15 | 900000000000000 |
| 16 | 1000000000000000 |
| 17 | 28900000000000000 |
| 18 | 0 |
| 19 | 0 |
| 20 | 10000000000000000000 |
| 21 | 0 |
| 22 | 0 |
| 23 | 0 |
| 24 | 900000000000000000000000 |
[0,12,108,1072,10000,108000,1666000,10000000, 810000000,1000000000,73810000000,873810000000,0,0, 900000000000000,1000000000000000, 28900000000000000,0,0,10000000000000000000,0,0,0, 900000000000000000000000] |