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| n | a(n) |
|---|---|
| 5 | 52 |
| 6 | 906 |
| 7 | 9891 |
| 8 | 87416 |
| 9 | 686826 |
| 10 | 5020092 |
| 11 | 35006202 |
| 12 | 236460312 |
| 13 | 1562226237 |
| 14 | 10158790642 |
| 15 | 65294141913 |
| 16 | 415967090448 |
| 17 | 2631510433188 |
| 18 | 16551428673528 |
| 19 | 103578621308388 |
| 20 | 645186720537744 |
| 21 | 4000912828433199 |
| 22 | 24700465510596414 |
| 23 | 151810205132056779 |
| 24 | 928768921758036744 |
[52,906,9891,87416,686826,5020092,35006202, 236460312,1562226237,10158790642,65294141913, 415967090448,2631510433188,16551428673528, 103578621308388,645186720537744,4000912828433199, 24700465510596414,151810205132056779, 928768921758036744] |