n | a(n) |
---|---|
4 | 1 |
5 | 10 |
6 | 65 |
7 | 350 |
8 | 1700 |
9 | 7752 |
10 | 33915 |
11 | 144210 |
12 | 600875 |
13 | 2466750 |
14 | 10015005 |
15 | 40320150 |
16 | 161280600 |
17 | 641886000 |
18 | 2544619500 |
19 | 10056336264 |
20 | 39645171810 |
21 | 155989499540 |
22 | 612815891050 |
23 | 2404551645100 |
24 | 9425842448792 |
25 | 36921502679600 |
26 | 144539291740025 |
27 | 565588532895750 |
28 | 2212449261033375 |
[1,10,65,350,1700,7752,33915,144210,600875, 2466750,10015005,40320150,161280600,641886000, 2544619500,10056336264,39645171810,155989499540, 612815891050,2404551645100,9425842448792, 36921502679600,144539291740025,565588532895750, 2212449261033375] |