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| n | a(n) |
|---|---|
| 7 | 5040 |
| 8 | 141120 |
| 9 | 2328480 |
| 10 | 29635200 |
| 11 | 322494480 |
| 12 | 3162075840 |
| 13 | 28805736960 |
| 14 | 248619571200 |
| 15 | 2060056318320 |
| 16 | 16540688324160 |
| 17 | 129568848121440 |
| 18 | 995210916336000 |
| 19 | 7524340159588560 |
| 20 | 56163512390086080 |
| 21 | 414847224363337920 |
[5040,141120,2328480,29635200,322494480, 3162075840,28805736960,248619571200,2060056318320, 16540688324160,129568848121440,995210916336000, 7524340159588560,56163512390086080, 414847224363337920] |