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| n | a(n) |
|---|---|
| 1 | 51 |
| 2 | 105 |
| 3 | 231 |
| 4 | 537 |
| 5 | 1311 |
| 6 | 3345 |
| 7 | 8871 |
| 8 | 24297 |
| 9 | 68271 |
| 10 | 195585 |
| 11 | 568311 |
| 12 | 1668057 |
| 13 | 4930431 |
| 14 | 14643825 |
| 15 | 43636551 |
| 16 | 130319817 |
| 17 | 389779791 |
| 18 | 1166980065 |
| 19 | 3496221591 |
| 20 | 10479227577 |
| 21 | 31418808351 |
| 22 | 94218676305 |
| 23 | 282580531431 |
| 24 | 847590599337 |
| 25 | 2542469808111 |
[51,105,231,537,1311,3345,8871,24297,68271,195585, 568311,1668057,4930431,14643825,43636551, 130319817,389779791,1166980065,3496221591, 10479227577,31418808351,94218676305,282580531431, 847590599337,2542469808111] |