n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | -2 |
3 | 6 |
4 | -22 |
5 | 90 |
6 | -394 |
7 | 1806 |
8 | -8558 |
9 | 41586 |
10 | -206098 |
11 | 1037718 |
12 | -5293446 |
13 | 27297738 |
14 | -142078746 |
15 | 745387038 |
16 | -3937603038 |
17 | 20927156706 |
18 | -111818026018 |
19 | 600318853926 |
20 | -3236724317174 |
21 | 17518619320890 |
22 | -95149655201962 |
23 | 518431875418926 |
24 | -2832923350929742 |
25 | 15521467648875090 |
[1,2,-2,6,-22,90,-394,1806,-8558,41586,-206098, 1037718,-5293446,27297738,-142078746,745387038, -3937603038,20927156706,-111818026018, 600318853926,-3236724317174,17518619320890, -95149655201962,518431875418926,-2832923350929742, 15521467648875090] |