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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 13 |
| 4 | 176 |
| 5 | 36543 |
| 6 | 1394774578 |
| 7 | 12493702893882521837 |
| 8 | 265316559833226727589598741150947701321 |
[2,3,13,176,36543,1394774578,12493702893882521837, 265316559833226727589598741150947701321] |