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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 17 |
| 4 | 31 |
| 5 | 53 |
| 6 | 85 |
| 7 | 133 |
| 8 | 197 |
| 9 | 293 |
| 10 | 417 |
| 11 | 593 |
| 12 | 849 |
| 13 | 1193 |
| 14 | 1661 |
| 15 | 2291 |
| 16 | 3139 |
| 17 | 4299 |
[1,3,9,17,31,53,85,133,197,293,417,593,849,1193, 1661,2291,3139,4299] |