n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 24 |
6 | 300 |
7 | 2400 |
8 | 15750 |
9 | 92680 |
10 | 510288 |
11 | 2691600 |
12 | 13793850 |
13 | 69309240 |
14 | 343499100 |
15 | 1686135352 |
16 | 8221421250 |
17 | 39901776360 |
18 | 193053923860 |
19 | 932142850800 |
20 | 4495236287850 |
21 | 21664357532920 |
22 | 104388118174500 |
23 | 503044634004000 |
24 | 2425003910574000 |
25 | 11696087875731600 |
[0,0,0,0,24,300,2400,15750,92680,510288,2691600, 13793850,69309240,343499100,1686135352,8221421250, 39901776360,193053923860,932142850800, 4495236287850,21664357532920,104388118174500, 503044634004000,2425003910574000, 11696087875731600] |