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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 27 |
| 2 | 472 |
| 3 | 6822 |
| 4 | 88963 |
| 5 | 1091349 |
| 6 | 12886714 |
| 7 | 148484664 |
| 8 | 1683799645 |
| 9 | 18895210191 |
| 10 | 210582084076 |
| 11 | 2336271745626 |
| 12 | 25842423980647 |
| 13 | 285296827032153 |
| 14 | 3145632963614158 |
| 15 | 34654478019199308 |
| 16 | 381572508324065569 |
[1,27,472,6822,88963,1091349,12886714,148484664, 1683799645,18895210191,210582084076,2336271745626, 25842423980647,285296827032153,3145632963614158, 34654478019199308,381572508324065569] |