| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 8 |
| 2 | 200 |
| 3 | 9088 |
| 4 | 815008 |
| 5 | 107966080 |
| 6 | 21110274432 |
| 7 | 5547859611648 |
| 8 | 1915915213103616 |
| 9 | 835475489428146176 |
| 10 | 450640330168225851392 |
| 11 | 294111441801356743442432 |
| 12 | 228643425697131126294224896 |
[2,8,200,9088,815008,107966080,21110274432, 5547859611648,1915915213103616,835475489428146176, 450640330168225851392,294111441801356743442432, 228643425697131126294224896] |