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| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 32 |
| 5 | 1280 |
| 6 | 81920 |
| 7 | 9175040 |
| 8 | 1879048192 |
| 9 | 721554505728 |
| 10 | 527765581332480 |
| 11 | 743093938516131840 |
| 12 | 2029141848108050677760 |
| 13 | 10804774512805748248936448 |
| 14 | 112652543574969605015820304384 |
| 15 | 2307124092415377510723999833784320 |
| 16 | 93045959704944111103266494219624120320 |
[1,32,1280,81920,9175040,1879048192,721554505728, 527765581332480,743093938516131840, 2029141848108050677760,10804774512805748248936448, 112652543574969605015820304384, 2307124092415377510723999833784320, 93045959704944111103266494219624120320] |