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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 9 |
| 3 | 31 |
| 4 | 95 |
| 5 | 309 |
| 6 | 911 |
| 7 | 2803 |
| 8 | 8673 |
| 9 | 26619 |
| 10 | 81959 |
| 11 | 252477 |
| 12 | 777327 |
| 13 | 2393627 |
| 14 | 7371657 |
| 15 | 22698115 |
| 16 | 69895583 |
| 17 | 215235669 |
| 18 | 662786215 |
| 19 | 2040959827 |
| 20 | 6284869089 |
| 21 | 19353386043 |
| 22 | 59596135287 |
| 23 | 183518286189 |
| 24 | 565119695167 |
| 25 | 1740209766219 |
| 26 | 5358741068409 |
[3,9,31,95,309,911,2803,8673,26619,81959,252477, 777327,2393627,7371657,22698115,69895583, 215235669,662786215,2040959827,6284869089, 19353386043,59596135287,183518286189,565119695167, 1740209766219,5358741068409] |