n | a(n) |
---|---|
0 | 1 |
1 | -2 |
2 | 8 |
3 | -40 |
4 | 222 |
5 | -1316 |
6 | 8160 |
7 | -52272 |
8 | 343220 |
9 | -2297682 |
10 | 15623760 |
11 | -107611608 |
12 | 749209832 |
13 | -5264005060 |
14 | 37277153920 |
15 | -265788870480 |
16 | 1906489923022 |
17 | -13747860118724 |
18 | 99606357848920 |
19 | -724732875917064 |
20 | 5293303253527704 |
21 | -38795196044205056 |
[1,-2,8,-40,222,-1316,8160,-52272,343220,-2297682, 15623760,-107611608,749209832,-5264005060, 37277153920,-265788870480,1906489923022, -13747860118724,99606357848920,-724732875917064, 5293303253527704,-38795196044205056] |