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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 11 |
| 3 | 101 |
| 4 | 1117 |
| 5 | 10111 |
| 6 | 101111 |
| 7 | 1111151 |
| 8 | 11110111 |
| 9 | 101111111 |
| 10 | 1111111121 |
| 11 | 11111111113 |
| 12 | 101111111111 |
| 13 | 1111111118111 |
| 14 | 11111111111411 |
| 15 | 111111111116111 |
| 16 | 1111111111111181 |
| 17 | 11111111101111111 |
| 18 | 101111111111111111 |
| 19 | 1111111111111111111 |
| 20 | 11011111111111111111 |
[2,11,101,1117,10111,101111,1111151,11110111, 101111111,1111111121,11111111113,101111111111, 1111111118111,11111111111411,111111111116111, 1111111111111181,11111111101111111, 101111111111111111,1111111111111111111, 11011111111111111111] |