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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 9 |
| 4 | 65 |
| 5 | 82 |
| 6 | 1111 |
| 7 | 12707 |
| 8 | 44127 |
| 9 | 270757 |
| 10 | 3324143 |
| 11 | 773311279 |
| 12 | 583426241 |
| 13 | 51327727127 |
| 14 | 1207458414241 |
| 15 | 251022006941731 |
| 16 | 1784247347470303 |
| 17 | 542442461832071 |
| 18 | 59337844204584969481 |
| 19 | 172785053530529793211 |
[1,1,2,9,65,82,1111,12707,44127,270757,3324143, 773311279,583426241,51327727127,1207458414241, 251022006941731,1784247347470303,542442461832071, 59337844204584969481,172785053530529793211] |