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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 111 |
| 3 | 0 |
| 4 | 10111 |
| 5 | 1000 |
| 6 | 1011111 |
| 7 | 110000 |
| 8 | 101110111 |
| 9 | 11101000 |
| 10 | 10101111111 |
| 11 | 1010110000 |
| 12 | 1010111110111 |
| 13 | 101011101000 |
| 14 | 101111011111111 |
| 15 | 10111000110000 |
| 16 | 10111011011110111 |
| 17 | 1011011111101000 |
| 18 | 1011001100111111111 |
| 19 | 110100011100110000 |
| 20 | 101100110101111110111 |
[1,0,111,0,10111,1000,1011111,110000,101110111, 11101000,10101111111,1010110000,1010111110111, 101011101000,101111011111111,10111000110000, 10111011011110111,1011011111101000, 1011001100111111111,110100011100110000, 101100110101111110111] |