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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 11 |
| 2 | 11 |
| 3 | 111 |
| 4 | 1011 |
| 5 | 10111 |
| 6 | 101011 |
| 7 | 1000111 |
| 8 | 11011011 |
| 9 | 110110111 |
| 10 | 1101101011 |
| 11 | 11011000111 |
| 12 | 110111011011 |
| 13 | 1101010110111 |
| 14 | 11010101101011 |
| 15 | 110101011000111 |
| 16 | 1101000111011011 |
| 17 | 11011011010110111 |
| 18 | 110110110101101011 |
| 19 | 1101101101011000111 |
| 20 | 11011011000111011011 |
[1,11,11,111,1011,10111,101011,1000111,11011011, 110110111,1101101011,11011000111,110111011011, 1101010110111,11010101101011,110101011000111, 1101000111011011,11011011010110111, 110110110101101011,1101101101011000111, 11011011000111011011] |