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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 60 |
| 2 | 60480 |
| 3 | 987033600 |
| 4 | 258492255436800 |
| 5 | 1083930404878024704000 |
| 6 | 72736898347485916060188672000 |
| 7 | 78099458182389588115529148326215680000 |
| 8 | 1341733356588640095264385107865053233298800640000 |
[1,60,60480,987033600,258492255436800, 1083930404878024704000, 72736898347485916060188672000, 78099458182389588115529148326215680000, 1341733356588640095264385107865053233298800640000] |