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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 100 |
| 3 | 1000 |
| 4 | 10000 |
| 5 | 100000 |
| 6 | 1000000 |
| 7 | 10000000 |
| 8 | 111100000 |
| 9 | 1111000000 |
| 10 | 11100000000 |
| 11 | 111000000000 |
| 12 | 1110000000000 |
| 13 | 11100000000000 |
| 14 | 111000000000000 |
| 15 | 1110000000000000 |
| 16 | 11100100000000000 |
| 17 | 111001000000000000 |
| 18 | 1110010000000000000 |
| 19 | 11100100000000000000 |
[1,10,100,1000,10000,100000,1000000,10000000, 111100000,1111000000,11100000000,111000000000, 1110000000000,11100000000000,111000000000000, 1110000000000000,11100100000000000, 111001000000000000,1110010000000000000, 11100100000000000000] |