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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5040 |
| 2 | 76281004800 |
| 3 | 37626350120206848000 |
| 4 | 185657801986983855655526400000 |
| 5 | 5150422429203073500358041285476352000000 |
| 6 | 569512147150397429576160463881863910421954560000000 |
| 7 | 199607288101583292042564550150623446229209414764068864000000000 |
[1,5040,76281004800,37626350120206848000, 185657801986983855655526400000, 5150422429203073500358041285476352000000, 56951214715039742957616046388186391042195456000000\ 0, 19960728810158329204256455015062344622920941476406\ 8864000000000] |