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| n | a(n) |
|---|---|
| 1 | 57 |
| 2 | 411 |
| 3 | 2318 |
| 4 | 14641 |
| 5 | 88103 |
| 6 | 541936 |
| 7 | 3302001 |
| 8 | 20204829 |
| 9 | 123402988 |
| 10 | 754319381 |
| 11 | 4609217629 |
| 12 | 28168842830 |
| 13 | 172139309061 |
| 14 | 1051973256999 |
| 15 | 6428702835542 |
| 16 | 39286618550317 |
| 17 | 240084864227147 |
| 18 | 1467186858794824 |
| 19 | 8966146857909117 |
[57,411,2318,14641,88103,541936,3302001,20204829, 123402988,754319381,4609217629,28168842830, 172139309061,1051973256999,6428702835542, 39286618550317,240084864227147,1467186858794824, 8966146857909117] |