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| n | a(n) |
|---|---|
| 1 | 277 |
| 2 | 1435 |
| 3 | 8825 |
| 4 | 60187 |
| 5 | 410305 |
| 6 | 2926867 |
| 7 | 20377961 |
| 8 | 147734251 |
| 9 | 1039350577 |
| 10 | 7613312515 |
| 11 | 53944065785 |
| 12 | 398046992347 |
| 13 | 2834584305025 |
| 14 | 21024264295027 |
| 15 | 150246189753161 |
| 16 | 1118382878221771 |
| 17 | 8011732148951377 |
| 18 | 59783309384192995 |
[277,1435,8825,60187,410305,2926867,20377961, 147734251,1039350577,7613312515,53944065785, 398046992347,2834584305025,21024264295027, 150246189753161,1118382878221771,8011732148951377, 59783309384192995] |