n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 0 |
3 | -3 |
4 | -11 |
5 | -30 |
6 | -72 |
7 | -162 |
8 | -353 |
9 | -756 |
10 | -1598 |
11 | -3334 |
12 | -6868 |
13 | -14002 |
14 | -28368 |
15 | -57374 |
16 | -116233 |
17 | -236165 |
18 | -480781 |
19 | -978293 |
20 | -1984231 |
21 | -4003365 |
22 | -8028201 |
23 | -16011129 |
24 | -31812545 |
25 | -63129395 |
26 | -125452526 |
27 | -250216779 |
28 | -501567302 |
[1,1,0,-3,-11,-30,-72,-162,-353,-756,-1598,-3334, -6868,-14002,-28368,-57374,-116233,-236165, -480781,-978293,-1984231,-4003365,-8028201, -16011129,-31812545,-63129395,-125452526, -250216779,-501567302] |