n | a(n) |
---|---|
4 | 0 |
5 | 0 |
6 | 0 |
7 | 18 |
8 | 400 |
9 | 7850 |
10 | 162288 |
11 | 3667650 |
12 | 91171008 |
13 | 2486784402 |
14 | 74062575400 |
15 | 2395420006034 |
16 | 83695120256592 |
17 | 3143661612445146 |
18 | 126375169532421600 |
19 | 5415486851106043650 |
20 | 246486713303685957376 |
[0,0,0,18,400,7850,162288,3667650,91171008, 2486784402,74062575400,2395420006034, 83695120256592,3143661612445146, 126375169532421600,5415486851106043650, 246486713303685957376] |