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A147712 as a simple table
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2674440 |
| 3 | 141371511060715200 |
| 4 | 300084647544974128326709244080 |
| 5 | 63459439063595192178662944522933222953984000 |
[1,2674440,141371511060715200, 300084647544974128326709244080, 63459439063595192178662944522933222953984000] |