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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 111 |
| 3 | 1101 |
| 4 | 11100 |
| 5 | 111101 |
| 6 | 1111100 |
| 7 | 11111101 |
| 8 | 111111100 |
| 9 | 1111111101 |
| 10 | 11111111100 |
| 11 | 111111111101 |
| 12 | 1111111111100 |
| 13 | 11111111111101 |
| 14 | 111111111111100 |
| 15 | 1111111111111101 |
| 16 | 11111111111111100 |
| 17 | 111111111111111101 |
| 18 | 1111111111111111100 |
| 19 | 11111111111111111101 |
[1,0,111,1101,11100,111101,1111100,11111101, 111111100,1111111101,11111111100,111111111101, 1111111111100,11111111111101,111111111111100, 1111111111111101,11111111111111100, 111111111111111101,1111111111111111100, 11111111111111111101] |