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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 3 |
| 3 | 30 |
| 4 | 300 |
| 5 | 3000 |
| 6 | 30000 |
| 7 | 300000 |
| 8 | 550503 |
| 9 | 3000000 |
| 10 | 5505030 |
| 11 | 30000000 |
| 12 | 55050300 |
| 13 | 300000000 |
| 14 | 550503000 |
| 15 | 3000000000 |
| 16 | 5505030000 |
| 17 | 30000000000 |
| 18 | 55050300000 |
| 19 | 300000000000 |
| 20 | 550500050003 |
| 21 | 550503000000 |
| 22 | 3000000000000 |
| 23 | 3000505050003 |
| 24 | 5505000500030 |
| 25 | 5505030000000 |
| 26 | 30000000000000 |
| 27 | 30005050500030 |
| 28 | 55050005000003 |
[0,3,30,300,3000,30000,300000,550503,3000000, 5505030,30000000,55050300,300000000,550503000, 3000000000,5505030000,30000000000,55050300000, 300000000000,550500050003,550503000000, 3000000000000,3000505050003,5505000500030, 5505030000000,30000000000000,30005050500030, 55050005000003] |