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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 184 |
| 4 | 8280 |
| 5 | 612720 |
| 6 | 67399200 |
| 7 | 10312077600 |
| 8 | 2093351752800 |
| 9 | 544271455728000 |
| 10 | 176343951655872000 |
| 11 | 69655860904069440000 |
| 12 | 32947222207624845120000 |
| 13 | 18384549991854663576960000 |
| 14 | 11949957494705531325024000000 |
| 15 | 8950518163534442962442976000000 |
[1,8,184,8280,612720,67399200,10312077600, 2093351752800,544271455728000,176343951655872000, 69655860904069440000,32947222207624845120000, 18384549991854663576960000, 11949957494705531325024000000, 8950518163534442962442976000000] |