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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 53 |
| 3 | 899 |
| 4 | 33255 |
| 5 | 2698979 |
| 6 | 480403525 |
| 7 | 187700534197 |
| 8 | 161035011766925 |
| 9 | 303461593374854353 |
| 10 | 1256322271164918861739 |
| 11 | 11428194376171669924653051 |
| 12 | 228444866925294986583863447811 |
| 13 | 10035740315100401504962617899482767 |
[7,53,899,33255,2698979,480403525,187700534197, 161035011766925,303461593374854353, 1256322271164918861739,11428194376171669924653051, 228444866925294986583863447811, 10035740315100401504962617899482767] |