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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1771561 |
| 2 | 113379904 |
| 3 | 1291467969 |
| 4 | 7256313856 |
| 5 | 27680640625 |
| 6 | 82653950016 |
| 7 | 208422380089 |
| 8 | 464404086784 |
| 9 | 941480149401 |
| 10 | 1771561000000 |
| 11 | 3138428376721 |
| 12 | 5289852801024 |
| 13 | 8550986578849 |
| 14 | 13339032325696 |
[0,1771561,113379904,1291467969,7256313856, 27680640625,82653950016,208422380089,464404086784, 941480149401,1771561000000,3138428376721, 5289852801024,8550986578849,13339032325696] |