n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | -1 |
4 | 7 |
5 | -13 |
6 | 55 |
7 | -133 |
8 | 463 |
9 | -1261 |
10 | 4039 |
11 | -11605 |
12 | 35839 |
13 | -105469 |
14 | 320503 |
15 | -953317 |
16 | 2876335 |
17 | -8596237 |
18 | 25854247 |
19 | -77431669 |
20 | 232557151 |
21 | -697147165 |
22 | 2092490071 |
23 | -6275373061 |
24 | 18830313487 |
25 | -56482551853 |
26 | 169464432775 |
27 | -508359743893 |
28 | 1525146340543 |
[0,0,1,-1,7,-13,55,-133,463,-1261,4039,-11605, 35839,-105469,320503,-953317,2876335,-8596237, 25854247,-77431669,232557151,-697147165, 2092490071,-6275373061,18830313487,-56482551853, 169464432775,-508359743893,1525146340543] |