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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 37 |
| 3 | 298 |
| 4 | 2425 |
| 5 | 19580 |
| 6 | 156862 |
| 7 | 1272373 |
| 8 | 10339597 |
| 9 | 83584679 |
| 10 | 675742932 |
| 11 | 5470806427 |
| 12 | 44295902902 |
| 13 | 358490386914 |
| 14 | 2901075834539 |
| 15 | 23480627788151 |
| 16 | 190053072058627 |
| 17 | 1538212852796494 |
| 18 | 12449506279663245 |
| 19 | 100761743839068352 |
[3,37,298,2425,19580,156862,1272373,10339597, 83584679,675742932,5470806427,44295902902, 358490386914,2901075834539,23480627788151, 190053072058627,1538212852796494, 12449506279663245,100761743839068352] |