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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 24 |
| 3 | 3240 |
| 4 | 1290240 |
| 5 | 1126125000 |
| 6 | 1822853652480 |
| 7 | 4914543582748800 |
| 8 | 20469829379869900800 |
| 9 | 124583146969045247683200 |
| 10 | 1061374990515840000000000000 |
| 11 | 12232437772393129356474535526400 |
[1,24,3240,1290240,1126125000,1822853652480, 4914543582748800,20469829379869900800, 124583146969045247683200, 1061374990515840000000000000, 12232437772393129356474535526400] |