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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 288 |
| 3 | 332928 |
| 4 | 443365544448 |
| 5 | 786292024016459316676608 |
| 6 | 2473020588127600939387543243786675530709484249088 |
[1,8,288,332928,443365544448, 786292024016459316676608, 2473020588127600939387543243786675530709484249088] |