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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 11 |
| 3 | 1111 |
| 4 | 11111 |
| 5 | 1111 |
| 6 | 11111 |
| 7 | 11111111 |
| 8 | 111111111 |
| 9 | 111111111 |
| 10 | 1111111111 |
| 11 | 111111111111 |
| 12 | 1111111111111 |
| 13 | 1100111111111 |
| 14 | 11001111111111 |
| 15 | 1111111111111111 |
| 16 | 11111111111111111 |
| 17 | 111111101111111111 |
| 18 | 1111111011111111111 |
| 19 | 11100001111111111111 |
[1,1,11,1111,11111,1111,11111,11111111,111111111, 111111111,1111111111,111111111111,1111111111111, 1100111111111,11001111111111,1111111111111111, 11111111111111111,111111101111111111, 1111111011111111111,11100001111111111111] |