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| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | 14 |
| 2 | 69 |
| 3 | 344 |
| 4 | 1719 |
| 5 | 8594 |
| 6 | 42969 |
| 7 | 214844 |
| 8 | 1074219 |
| 9 | 5371094 |
| 10 | 26855469 |
| 11 | 134277344 |
| 12 | 671386719 |
| 13 | 3356933594 |
| 14 | 16784667969 |
| 15 | 83923339844 |
| 16 | 419616699219 |
| 17 | 2098083496094 |
| 18 | 10490417480469 |
| 19 | 52452087402344 |
| 20 | 262260437011719 |
| 21 | 1311302185058594 |
[3,14,69,344,1719,8594,42969,214844,1074219, 5371094,26855469,134277344,671386719,3356933594, 16784667969,83923339844,419616699219, 2098083496094,10490417480469,52452087402344, 262260437011719,1311302185058594] |