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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 113400 |
| 6 | 50432680389260400 |
| 7 | 101720498887190010630546323580 |
| 8 | 1021718304724615708073668620385984867252800 |
| 9 | 52487498990202837315687104908805779583934003413314100425 |
[0,0,0,0,113400,50432680389260400, 101720498887190010630546323580, 1021718304724615708073668620385984867252800, 52487498990202837315687104908805779583934003413314\ 100425] |