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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 13 |
| 4 | 17 |
| 5 | 33 |
| 6 | 43 |
| 7 | 205 |
| 8 | 287 |
| 9 | 669 |
| 10 | 1161 |
| 11 | 1166 |
| 12 | 3753 |
| 13 | 6095 |
| 14 | 18123 |
| 15 | 28041 |
[1,7,13,17,33,43,205,287,669,1161,1166,3753,6095, 18123,28041] |