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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 10 |
| 3 | 1100 |
| 4 | 100 |
| 5 | 11000 |
| 6 | 101000 |
| 7 | 11110000 |
| 8 | 10000 |
| 9 | 1100000 |
| 10 | 10100000 |
| 11 | 1111000000 |
| 12 | 10001000000 |
| 13 | 1100110000000 |
| 14 | 10101010000000 |
| 15 | 1111111100000000 |
| 16 | 100000000 |
| 17 | 11000000000 |
| 18 | 101000000000 |
| 19 | 11110000000000 |
| 20 | 100010000000000 |
| 21 | 11001100000000000 |
| 22 | 101010100000000000 |
[1,10,10,1100,100,11000,101000,11110000,10000, 1100000,10100000,1111000000,10001000000, 1100110000000,10101010000000,1111111100000000, 100000000,11000000000,101000000000,11110000000000, 100010000000000,11001100000000000, 101010100000000000] |