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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 7 |
| 3 | 14 |
| 4 | 33 |
| 5 | 78 |
| 6 | 189 |
| 7 | 482 |
| 8 | 1225 |
| 9 | 3238 |
| 10 | 8565 |
| 11 | 23114 |
| 12 | 62657 |
| 13 | 171342 |
| 14 | 470573 |
| 15 | 1297330 |
| 16 | 3586745 |
| 17 | 9934454 |
| 18 | 27559269 |
| 19 | 76525210 |
| 20 | 212662577 |
| 21 | 591289630 |
| 22 | 1644693789 |
| 23 | 4576035586 |
| 24 | 12734509097 |
| 25 | 35443628358 |
| 26 | 98659578197 |
| 27 | 274645954794 |
[3,7,14,33,78,189,482,1225,3238,8565,23114,62657, 171342,470573,1297330,3586745,9934454,27559269, 76525210,212662577,591289630,1644693789, 4576035586,12734509097,35443628358,98659578197, 274645954794] |