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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 108 |
| 2 | 1296 |
| 3 | 326592 |
| 4 | 15116544 |
| 5 | 665127936 |
| 6 | 28298170368 |
| 7 | 235092492288 |
| 8 | 47958868426752 |
| 9 | 1929639176699904 |
| 10 | 10968475320188928 |
| 11 | 3027299188372144128 |
| 12 | 4738381338321616896 |
| 13 | 4605706660848611622912 |
| 14 | 178087324219479649419264 |
| 15 | 6853291511342734094893056 |
[1,108,1296,326592,15116544,665127936,28298170368, 235092492288,47958868426752,1929639176699904, 10968475320188928,3027299188372144128, 4738381338321616896,4605706660848611622912, 178087324219479649419264, 6853291511342734094893056] |