n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 6 |
4 | 24 |
5 | 60 |
6 | 2280 |
7 | 35490 |
8 | 322896 |
9 | 6532344 |
10 | 175392720 |
11 | 3351681630 |
12 | 74021715240 |
13 | 2328376978356 |
14 | 68824597123464 |
15 | 1989994550546730 |
16 | 69687384248405280 |
17 | 2634948077918611440 |
18 | 98220733842576688416 |
19 | 3966108617957749165494 |
20 | 175679596523004500742840 |
[1,0,0,6,24,60,2280,35490,322896,6532344, 175392720,3351681630,74021715240,2328376978356, 68824597123464,1989994550546730,69687384248405280, 2634948077918611440,98220733842576688416, 3966108617957749165494,175679596523004500742840] |