n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | -1 |
4 | -2 |
5 | -5 |
6 | -10 |
7 | -20 |
8 | -41 |
9 | -86 |
10 | -182 |
11 | -393 |
12 | -853 |
13 | -1887 |
14 | -4208 |
15 | -9445 |
16 | -21350 |
17 | -48612 |
18 | -111307 |
19 | -255236 |
20 | -590543 |
21 | -1362919 |
22 | -3182137 |
23 | -7362611 |
24 | -17377129 |
25 | -40125851 |
26 | -96106251 |
27 | -219681825 |
28 | -539266908 |
29 | -1200140540 |
[1,0,0,-1,-2,-5,-10,-20,-41,-86,-182,-393,-853, -1887,-4208,-9445,-21350,-48612,-111307,-255236, -590543,-1362919,-3182137,-7362611,-17377129, -40125851,-96106251,-219681825,-539266908, -1200140540] |