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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 5 |
| 4 | 17 |
| 5 | 20 |
| 6 | 28 |
| 7 | 173 |
| 8 | 181 |
| 9 | 331 |
| 10 | 575 |
| 11 | 1313 |
| 12 | 1754 |
| 13 | 4067 |
| 14 | 27314 |
[1,4,5,17,20,28,173,181,331,575,1313,1754,4067, 27314] |