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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 11 |
| 2 | 100 |
| 3 | 11 |
| 4 | 11000 |
| 5 | 1111 |
| 6 | 1100000 |
| 7 | 10011111 |
| 8 | 0 |
| 9 | 1101111111 |
| 10 | 0 |
| 11 | 111111111111 |
| 12 | 0 |
| 13 | 11111111111111 |
| 14 | 1100000000000 |
| 15 | 1000011111111111 |
| 16 | 110000000000000 |
| 17 | 110001111111111111 |
| 18 | 100000000000000 |
| 19 | 11100111111111111111 |
| 20 | 10000000000000000 |
| 21 | 1111001111111111111111 |
[1,11,100,11,11000,1111,1100000,10011111,0, 1101111111,0,111111111111,0,11111111111111, 1100000000000,1000011111111111,110000000000000, 110001111111111111,100000000000000, 11100111111111111111,10000000000000000, 1111001111111111111111] |