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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 5 |
| 5 | 12 |
| 6 | 13 |
| 7 | 14 |
| 8 | 23 |
| 9 | 57 |
| 10 | 106 |
| 11 | 226 |
| 12 | 227 |
| 13 | 311 |
| 14 | 373 |
| 15 | 1046 |
| 16 | 1298 |
| 17 | 1787 |
| 18 | 1952 |
| 19 | 2130 |
| 20 | 2285 |
| 21 | 2670 |
| 22 | 3254 |
| 23 | 3642 |
| 24 | 4369 |
| 25 | 13559 |
| 26 | 33418 |
| 27 | 66830 |
[2,3,4,5,12,13,14,23,57,106,226,227,311,373,1046, 1298,1787,1952,2130,2285,2670,3254,3642,4369, 13559,33418,66830] |