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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 11100 |
| 4 | 111 |
| 5 | 111100100 |
| 6 | 110011100 |
| 7 | 111110000 |
| 8 | 1111100 |
| 9 | 1110011 |
| 10 | 1100111100100 |
| 11 | 1111100100100 |
| 12 | 1111000011100 |
| 13 | 1110011100100 |
| 14 | 1100111110000 |
| 15 | 11100100111100100 |
| 16 | 11111 |
| 17 | 1111110000100 |
| 18 | 11001110011 |
| 19 | 1111110010000 |
| 20 | 11110000111100100 |
[0,1,11100,111,111100100,110011100,111110000, 1111100,1110011,1100111100100,1111100100100, 1111000011100,1110011100100,1100111110000, 11100100111100100,11111,1111110000100,11001110011, 1111110010000,11110000111100100] |