n | a(n) |
---|---|
0 | 1 |
1 | -1 |
2 | 1 |
3 | -2 |
4 | 5 |
5 | -13 |
6 | 35 |
7 | -98 |
8 | 282 |
9 | -832 |
10 | 2505 |
11 | -7662 |
12 | 23715 |
13 | -74104 |
14 | 233429 |
15 | -740511 |
16 | 2363816 |
17 | -7587409 |
18 | 24473880 |
19 | -79289278 |
20 | 257890856 |
21 | -841789791 |
22 | 2756618710 |
23 | -9053837032 |
24 | 29817032534 |
25 | -98441372386 |
26 | 325753459625 |
27 | -1080250590778 |
[1,-1,1,-2,5,-13,35,-98,282,-832,2505,-7662,23715, -74104,233429,-740511,2363816,-7587409,24473880, -79289278,257890856,-841789791,2756618710, -9053837032,29817032534,-98441372386,325753459625, -1080250590778] |