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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 11 |
| 3 | 111 |
| 4 | 1111 |
| 5 | 11111 |
| 6 | 111111 |
| 7 | 1110111 |
| 8 | 11100111 |
| 9 | 111000111 |
| 10 | 1110000111 |
| 11 | 11100000111 |
| 12 | 111000000111 |
| 13 | 1110000000111 |
| 14 | 11100000000111 |
| 15 | 111000000000111 |
| 16 | 1110000000000111 |
| 17 | 11100000000000111 |
| 18 | 111000000000000111 |
[1,11,111,1111,11111,111111,1110111,11100111, 111000111,1110000111,11100000111,111000000111, 1110000000111,11100000000111,111000000000111, 1110000000000111,11100000000000111, 111000000000000111] |