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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 11 |
| 2 | 101 |
| 3 | 1011 |
| 4 | 11011 |
| 5 | 100111 |
| 6 | 1110111 |
| 7 | 11001111 |
| 8 | 111101111 |
| 9 | 1010011111 |
| 10 | 11001011111 |
| 11 | 111000111111 |
| 12 | 1000110111111 |
| 13 | 11110001111111 |
| 14 | 111100101111111 |
| 15 | 1000000011111111 |
| 16 | 10000011011111111 |
| 17 | 100000000111111111 |
| 18 | 1000000010111111111 |
| 19 | 11001000001111111111 |
[1,11,101,1011,11011,100111,1110111,11001111, 111101111,1010011111,11001011111,111000111111, 1000110111111,11110001111111,111100101111111, 1000000011111111,10000011011111111, 100000000111111111,1000000010111111111, 11001000001111111111] |