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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 129 |
| 3 | 7965 |
| 4 | 910785 |
| 5 | 168520725 |
| 6 | 46302986625 |
| 7 | 17780913886125 |
| 8 | 9118678334858625 |
| 9 | 6027946461936745125 |
| 10 | 4993688347647511370625 |
| 11 | 5067155718588449670088125 |
| 12 | 6180682927872411162068450625 |
[1,5,129,7965,910785,168520725,46302986625, 17780913886125,9118678334858625, 6027946461936745125,4993688347647511370625, 5067155718588449670088125, 6180682927872411162068450625] |