n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | -1 |
3 | -4 |
4 | 9 |
5 | 52 |
6 | -175 |
7 | -1370 |
8 | 5985 |
9 | 60216 |
10 | -320063 |
11 | -3929550 |
12 | 24549745 |
13 | 354693796 |
14 | -2543955167 |
15 | -42233123938 |
16 | 341610526145 |
17 | 6404634620016 |
18 | -57626692351871 |
19 | -1203767371104790 |
20 | 11918048043239377 |
21 | 274395314816604636 |
[1,1,-1,-4,9,52,-175,-1370,5985,60216,-320063, -3929550,24549745,354693796,-2543955167, -42233123938,341610526145,6404634620016, -57626692351871,-1203767371104790, 11918048043239377,274395314816604636] |