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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 19 |
| 4 | 1091 |
| 5 | 4270307 |
| 6 | 65975813893475 |
| 7 | 15748607358316275150858234851 |
| 8 | 897339846665475127909937786392825941994036757434025817827 |
| 9 | 2913308988276889310145046342161059349226587591969604604068795694857825566722967409631885309325418272374141705507555 |
[1,3,19,1091,4270307,65975813893475, 15748607358316275150858234851, 89733984666547512790993778639282594199403675743402\ 5817827, 29133089882768893101450463421610593492265875919696\ 04604068795694857825566722967409631885309325418272\ 374141705507555] |