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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 0 |
| 3 | 11 |
| 4 | 10000 |
| 5 | 111 |
| 6 | 1000000 |
| 7 | 1111 |
| 8 | 100000000 |
| 9 | 10011111 |
| 10 | 11000000000 |
| 11 | 1100111111 |
| 12 | 1000000000000 |
| 13 | 1111111 |
| 14 | 111110000000000 |
| 15 | 10011111111 |
| 16 | 11100000000000000 |
| 17 | 100000111111111 |
| 18 | 1110000000000000000 |
| 19 | 10000001111111111 |
| 20 | 111000000000000000000 |
| 21 | 110011111111111 |
[1,1,0,11,10000,111,1000000,1111,100000000, 10011111,11000000000,1100111111,1000000000000, 1111111,111110000000000,10011111111, 11100000000000000,100000111111111, 1110000000000000000,10000001111111111, 111000000000000000000,110011111111111] |