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| n | a(n) |
|---|---|
| 0 | 21 |
| 1 | 23 |
| 2 | 25 |
| 3 | 27 |
| 4 | 32 |
| 5 | 35 |
| 6 | 43 |
| 7 | 113 |
| 8 | 212 |
| 9 | 10111 |
| 10 | 11111111111111111111111 |
[21,23,25,27,32,35,43,113,212,10111, 11111111111111111111111] |