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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 10 |
| 3 | 100 |
| 4 | 100 |
| 5 | 1000 |
| 6 | 101000 |
| 7 | 1010000 |
| 8 | 10000 |
| 9 | 100000 |
| 10 | 110100000 |
| 11 | 1101000000 |
| 12 | 100001000000 |
| 13 | 1000010000000 |
| 14 | 101010000000 |
| 15 | 1010100000000 |
| 16 | 100000100000000 |
| 17 | 1000001000000000 |
| 18 | 101000101000000000 |
| 19 | 1010001010000000000 |
| 20 | 1100010000000000 |
| 21 | 11000100000000000 |
[1,10,10,100,100,1000,101000,1010000,10000,100000, 110100000,1101000000,100001000000,1000010000000, 101010000000,1010100000000,100000100000000, 1000001000000000,101000101000000000, 1010001010000000000,1100010000000000, 11000100000000000] |