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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 60 |
| 2 | 2310 |
| 3 | 73920 |
| 4 | 2162160 |
| 5 | 60540480 |
| 6 | 1664863200 |
| 7 | 45664819200 |
| 8 | 1261490630400 |
| 9 | 35321737651200 |
| 10 | 1006669523059200 |
| 11 | 29284931579904000 |
| 12 | 871226714502144000 |
| 13 | 26538906072526848000 |
| 14 | 828392996692445184000 |
[1,60,2310,73920,2162160,60540480,1664863200, 45664819200,1261490630400,35321737651200, 1006669523059200,29284931579904000, 871226714502144000,26538906072526848000, 828392996692445184000] |