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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 10 |
| 3 | 100 |
| 4 | 100 |
| 5 | 1000 |
| 6 | 1000 |
| 7 | 1110000 |
| 8 | 10010000 |
| 9 | 101100000 |
| 10 | 110100000 |
| 11 | 11111000000 |
| 12 | 11001000000 |
| 13 | 1110110000000 |
| 14 | 1111010000000 |
| 15 | 110001100000000 |
| 16 | 100100100000000 |
| 17 | 11000111000000000 |
| 18 | 1101101000000000 |
| 19 | 1100011110000000000 |
| 20 | 11110110010000000000 |
[1,10,10,100,100,1000,1000,1110000,10010000, 101100000,110100000,11111000000,11001000000, 1110110000000,1111010000000,110001100000000, 100100100000000,11000111000000000, 1101101000000000,1100011110000000000, 11110110010000000000] |