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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 45888 |
| 5 | 72621240 |
| 6 | 44981038296 |
| 7 | 18389612809680 |
| 8 | 6040299916376448 |
| 9 | 1749772454946512832 |
| 10 | 469799260595276780160 |
| 11 | 120267085682566659944448 |
| 12 | 29853755210933389459501056 |
| 13 | 7260112922454133870956552192 |
| 14 | 1740894557985015492853351907328 |
| 15 | 413292356519150082930093737902080 |
[0,0,0,45888,72621240,44981038296,18389612809680, 6040299916376448,1749772454946512832, 469799260595276780160,120267085682566659944448, 29853755210933389459501056, 7260112922454133870956552192, 1740894557985015492853351907328, 413292356519150082930093737902080] |