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| n | a(n) |
|---|---|
| 1 | 31 |
| 2 | 411 |
| 3 | 3111 |
| 4 | 501111 |
| 5 | 2211111 |
| 6 | 129111111 |
| 7 | 291111111 |
| 8 | 7311111111 |
| 9 | 882111111111 |
| 10 | 23481111111111 |
| 11 | 74511111111111 |
| 12 | 8385111111111111 |
| 13 | 419541111111111111 |
| 14 | 15531711111111111111 |
| 15 | 169059111111111111111 |
| 16 | 641451111111111111111 |
| 17 | 457680711111111111111111 |
| 18 | 138816111111111111111111 |
[31,411,3111,501111,2211111,129111111,291111111, 7311111111,882111111111,23481111111111, 74511111111111,8385111111111111, 419541111111111111,15531711111111111111, 169059111111111111111,641451111111111111111, 457680711111111111111111,138816111111111111111111] |