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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 21 |
| 2 | 711 |
| 3 | 240111 |
| 4 | 51111 |
| 5 | 45411111 |
| 6 | 16059111111 |
| 7 | 43761111111 |
| 8 | 2121411111111 |
| 9 | 328203111111111 |
| 10 | 11862441111111111 |
| 11 | 37253511111111111 |
| 12 | 10630644111111111111 |
| 13 | 141896571111111111111 |
| 14 | 17806995411111111111111 |
| 15 | 9675948111111111111111 |
| 16 | 11187474501111111111111111 |
| 17 | 235460890911111111111111111 |
[2,21,711,240111,51111,45411111,16059111111, 43761111111,2121411111111,328203111111111, 11862441111111111,37253511111111111, 10630644111111111111,141896571111111111111, 17806995411111111111111,9675948111111111111111, 11187474501111111111111111, 235460890911111111111111111] |