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| n | a(n) |
|---|---|
| 1 | 297 |
| 2 | 1647 |
| 3 | 9126 |
| 4 | 50571 |
| 5 | 280233 |
| 6 | 1552878 |
| 7 | 8605089 |
| 8 | 47684079 |
| 9 | 264235662 |
| 10 | 1464230547 |
| 11 | 8113859721 |
| 12 | 44961990246 |
| 13 | 249151530393 |
| 14 | 1380643622703 |
| 15 | 7650672704694 |
| 16 | 42395294391579 |
| 17 | 234928490071977 |
| 18 | 1301828333534622 |
[297,1647,9126,50571,280233,1552878,8605089, 47684079,264235662,1464230547,8113859721, 44961990246,249151530393,1380643622703, 7650672704694,42395294391579,234928490071977, 1301828333534622] |