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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 11 |
| 2 | 101 |
| 3 | 1011 |
| 4 | 11011 |
| 5 | 110111 |
| 6 | 1110111 |
| 7 | 11101111 |
| 8 | 111101111 |
| 9 | 1111011111 |
| 10 | 11111011111 |
| 11 | 111110111111 |
| 12 | 1111110111111 |
| 13 | 11111101111111 |
| 14 | 111111101111111 |
| 15 | 1111111011111111 |
| 16 | 11111111011111111 |
| 17 | 111111110111111111 |
| 18 | 1111111110111111111 |
| 19 | 11111111101111111111 |
[1,11,101,1011,11011,110111,1110111,11101111, 111101111,1111011111,11111011111,111110111111, 1111110111111,11111101111111,111111101111111, 1111111011111111,11111111011111111, 111111110111111111,1111111110111111111, 11111111101111111111] |