n | a(n) |
---|---|
8 | 5040 |
9 | 109584 |
10 | 1172700 |
11 | 8409500 |
12 | 45995730 |
13 | 206070150 |
14 | 790943153 |
15 | 2681453775 |
16 | 8207628000 |
17 | 23057159840 |
18 | 60202693980 |
19 | 147560703732 |
20 | 342252511900 |
21 | 756111184500 |
22 | 1599718388730 |
23 | 3256091103430 |
24 | 6400590336096 |
25 | 12191224980000 |
26 | 22563937825000 |
27 | 40681506808800 |
[5040,109584,1172700,8409500,45995730,206070150, 790943153,2681453775,8207628000,23057159840, 60202693980,147560703732,342252511900, 756111184500,1599718388730,3256091103430, 6400590336096,12191224980000,22563937825000, 40681506808800] |