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| n | a(n) |
|---|---|
| 7 | 5040 |
| 8 | 20160 |
| 9 | 151200 |
| 10 | 907200 |
| 11 | 6431040 |
| 12 | 42577920 |
| 13 | 326280240 |
| 14 | 2437475040 |
| 15 | 15076381320 |
| 16 | 101442781440 |
| 17 | 685186844160 |
| 18 | 4578510605760 |
| 19 | 31826713309344 |
| 20 | 215132601512160 |
| 21 | 1519348223060640 |
| 22 | 9879977905237440 |
| 23 | 67264821737934744 |
| 24 | 453057807190266432 |
| 25 | 3094793914863208800 |
[5040,20160,151200,907200,6431040,42577920, 326280240,2437475040,15076381320,101442781440, 685186844160,4578510605760,31826713309344, 215132601512160,1519348223060640,9879977905237440, 67264821737934744,453057807190266432, 3094793914863208800] |