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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 77 |
| 4 | 3191 |
| 5 | 332481 |
| 6 | 83495679 |
| 7 | 49089025473 |
| 8 | 66142622730623 |
| 9 | 200954040909283841 |
| 10 | 1359156203343916471295 |
| 11 | 20253823024219712679748609 |
| 12 | 659335186924510858208484730879 |
| 13 | 46554554840488755704034417937268737 |
[1,1,5,77,3191,332481,83495679,49089025473, 66142622730623,200954040909283841, 1359156203343916471295,20253823024219712679748609, 659335186924510858208484730879, 46554554840488755704034417937268737] |