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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 11 |
| 2 | 11 |
| 3 | 1011 |
| 4 | 11011 |
| 5 | 1011 |
| 6 | 111011 |
| 7 | 11001011 |
| 8 | 1111011 |
| 9 | 101001011 |
| 10 | 11111111011 |
| 11 | 11101001011 |
| 12 | 1000111111011 |
| 13 | 11010001001011 |
| 14 | 11110111111011 |
| 15 | 1000010101001011 |
| 16 | 11001111111111011 |
| 17 | 11100010001001011 |
| 18 | 1001101110111111011 |
| 19 | 11100101010101001011 |
| 20 | 111111111111111011 |
[1,11,11,1011,11011,1011,111011,11001011,1111011, 101001011,11111111011,11101001011,1000111111011, 11010001001011,11110111111011,1000010101001011, 11001111111111011,11100010001001011, 1001101110111111011,11100101010101001011, 111111111111111011] |