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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 91 |
| 3 | 1729 |
| 4 | 43225 |
| 5 | 1339975 |
| 6 | 49579075 |
| 7 | 2131900225 |
| 8 | 14923301575 |
| 9 | 164156317325 |
| 10 | 10013535356825 |
| 11 | 670906868907275 |
| 12 | 48976201430231075 |
| 13 | 3869119912988254925 |
| 14 | 65775038520800333725 |
| 15 | 65775038520800333725 |
| 16 | 6380178736517632371325 |
[1,7,91,1729,43225,1339975,49579075,2131900225, 14923301575,164156317325,10013535356825, 670906868907275,48976201430231075, 3869119912988254925,65775038520800333725, 65775038520800333725,6380178736517632371325] |