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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 362880 |
| 2 | 33007837322880 |
| 3 | 7408611474125625953280 |
| 4 | 2499611266020127048565292881280 |
| 5 | 1064141699563485513180737844317706666240 |
| 6 | 526577363627345975232160422620146408876598167680 |
| 7 | 289514065258843883748159731480148589989905149052842682880 |
[1,362880,33007837322880,7408611474125625953280, 2499611266020127048565292881280, 1064141699563485513180737844317706666240, 526577363627345975232160422620146408876598167680, 28951406525884388374815973148014858998990514905284\ 2682880] |