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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 111 |
| 3 | 111 |
| 4 | 11111 |
| 5 | 111111 |
| 6 | 1111111 |
| 7 | 111111 |
| 8 | 111111111 |
| 9 | 110111111 |
| 10 | 11111111111 |
| 11 | 111111111111 |
| 12 | 1111111111111 |
| 13 | 110111111111 |
| 14 | 111111111111111 |
| 15 | 1111111111111 |
| 16 | 11111111111111111 |
| 17 | 1100111111111111 |
| 18 | 1111111111111111111 |
| 19 | 11110111111111111 |
| 20 | 111111111111111111111 |
[1,1,111,111,11111,111111,1111111,111111, 111111111,110111111,11111111111,111111111111, 1111111111111,110111111111,111111111111111, 1111111111111,11111111111111111,1100111111111111, 1111111111111111111,11110111111111111, 111111111111111111111] |