n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 24 |
6 | 300 |
7 | 2400 |
8 | 15750 |
9 | 92680 |
10 | 510312 |
11 | 2691600 |
12 | 13794150 |
13 | 69309240 |
14 | 343501500 |
15 | 1686135376 |
16 | 8221437000 |
17 | 39901776360 |
18 | 193054016840 |
19 | 932142850800 |
20 | 4495236798162 |
21 | 21664357535320 |
22 | 104388120866100 |
23 | 503044634004000 |
24 | 2425003924383900 |
25 | 11696087875731624 |
[0,0,0,0,24,300,2400,15750,92680,510312,2691600, 13794150,69309240,343501500,1686135376,8221437000, 39901776360,193054016840,932142850800, 4495236798162,21664357535320,104388120866100, 503044634004000,2425003924383900, 11696087875731624] |