n | a(n) |
---|---|
0 | -1 |
1 | -1 |
2 | 0 |
3 | 8 |
4 | 78 |
5 | 764 |
6 | 8310 |
7 | 100988 |
8 | 1362438 |
9 | 20246444 |
10 | 328972470 |
11 | 5805917468 |
12 | 110645911398 |
13 | 2265191981324 |
14 | 49589790516630 |
15 | 1156201277261948 |
16 | 28605950745797958 |
17 | 748605590542359404 |
18 | 20661245832389468790 |
19 | 599820758571599742428 |
20 | 18272940402442730318118 |
[-1,-1,0,8,78,764,8310,100988,1362438,20246444, 328972470,5805917468,110645911398,2265191981324, 49589790516630,1156201277261948,28605950745797958, 748605590542359404,20661245832389468790, 599820758571599742428,18272940402442730318118] |