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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 34650 |
| 4 | 54067759732546560 |
| 5 | 3138774474975381117998859525561 |
| 6 | 4611389774049135678307206605901825339706084920 |
| 7 | 118146008179337031214747923950181684918919939516291368598887900 |
[0,0,34650,54067759732546560, 3138774474975381117998859525561, 4611389774049135678307206605901825339706084920, 11814600817933703121474792395018168491891993951629\ 1368598887900] |