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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 424 |
| 3 | 798960 |
| 4 | 20962209174670432 |
| 5 | 247984783510749556138000 |
| 6 | 163976067636254581923091475287730651413600 |
| 7 | 8961962227285899756481561562282509859208082639814672 |
[8,424,798960,20962209174670432, 247984783510749556138000, 163976067636254581923091475287730651413600, 89619622272858997564815615622825098592080826398146\ 72] |