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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 27 |
| 2 | 482 |
| 3 | 7069 |
| 4 | 93668 |
| 5 | 1166750 |
| 6 | 13970034 |
| 7 | 162725364 |
| 8 | 1857511568 |
| 9 | 20877697634 |
| 10 | 231802823220 |
| 11 | 2548286736297 |
| 12 | 27785452449086 |
| 13 | 300880375389757 |
| 14 | 3239062263181054 |
| 15 | 34693207724724246 |
| 16 | 369957928177109416 |
| 17 | 3929837791070240368 |
| 18 | 41600963003695964400 |
| 19 | 439035480966899467508 |
[1,27,482,7069,93668,1166750,13970034,162725364, 1857511568,20877697634,231802823220,2548286736297, 27785452449086,300880375389757,3239062263181054, 34693207724724246,369957928177109416, 3929837791070240368,41600963003695964400, 439035480966899467508] |