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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 3 |
| 2 | 6 |
| 3 | 9 |
| 4 | 12 |
| 5 | 45 |
| 6 | 78 |
| 7 | 1011 |
| 8 | 4344 |
| 9 | 7677 |
| 10 | 1091010 |
| 11 | 43124343 |
| 12 | 76457676 |
| 13 | 10978109109 |
| 14 | 4312101143124312 |
| 15 | 7645434476457645 |
| 16 | 1097876771097810978 |
| 17 | 4312101110910104312101143121011 |
| 18 | 76454344431243437645434476454344 |
[0,3,6,9,12,45,78,1011,4344,7677,1091010,43124343, 76457676,10978109109,4312101143124312, 7645434476457645,1097876771097810978, 4312101110910104312101143121011, 76454344431243437645434476454344] |