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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1100 |
| 3 | 11100100 |
| 4 | 11110000 |
| 5 | 111100100100 |
| 6 | 110011100100 |
| 7 | 111110000100 |
| 8 | 111110010000 |
| 9 | 111001110000 |
| 10 | 1100111100100100 |
| 11 | 1111100100100100 |
| 12 | 1111000011100100 |
| 13 | 1110011100100100 |
| 14 | 1100111110000100 |
| 15 | 11100100111100100100 |
| 16 | 111111000000 |
| 17 | 1111110000100100 |
| 18 | 1100111001110000 |
| 19 | 1111110010000100 |
[0,1100,11100100,11110000,111100100100, 110011100100,111110000100,111110010000, 111001110000,1100111100100100,1111100100100100, 1111000011100100,1110011100100100, 1100111110000100,11100100111100100100, 111111000000,1111110000100100,1100111001110000, 1111110010000100] |