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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 11 |
| 3 | 151 |
| 4 | 1151 |
| 5 | 11551 |
| 6 | 115151 |
| 7 | 1111151 |
| 8 | 15511151 |
| 9 | 111151511 |
| 10 | 1111115111 |
| 11 | 11111151551 |
| 12 | 111111111511 |
| 13 | 1111111155151 |
| 14 | 11111111511151 |
| 15 | 111111111155111 |
| 16 | 1111111111155151 |
| 17 | 11111111111115151 |
| 18 | 111111111115151551 |
[5,11,151,1151,11551,115151,1111151,15511151, 111151511,1111115111,11111151551,111111111511, 1111111155151,11111111511151,111111111155111, 1111111111155151,11111111111115151, 111111111115151551] |