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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 18 |
| 4 | 843 |
| 5 | 1860498 |
| 6 | 9062201101803 |
| 7 | 215002084978043708894524818 |
| 8 | 121020968315000050139390193037122554865361969834971243 |
| 9 | 38343921554607207587938114587587818441864732465057252794474861753545122655196096751375348482086938743684498 |
[2,3,18,843,1860498,9062201101803, 215002084978043708894524818, 12102096831500005013939019303712255486536196983497\ 1243, 38343921554607207587938114587587818441864732465057\ 25279447486175354512265519609675137534848208693874\ 3684498] |