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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1101 |
| 4 | 10001 |
| 5 | 11101 |
| 6 | 110001 |
| 7 | 1111101 |
| 8 | 1110001 |
| 9 | 1101111101 |
| 10 | 10001110001 |
| 11 | 11111111101 |
| 12 | 111111110001 |
| 13 | 1111111111101 |
| 14 | 11111111110001 |
| 15 | 111111111111101 |
| 16 | 1111111111110001 |
| 17 | 11111111111111101 |
| 18 | 111111111111110001 |
| 19 | 1111111111111111101 |
| 20 | 11111111111111110001 |
[1,1,1,1101,10001,11101,110001,1111101,1110001, 1101111101,10001110001,11111111101,111111110001, 1111111111101,11111111110001,111111111111101, 1111111111110001,11111111111111101, 111111111111110001,1111111111111111101, 11111111111111110001] |