n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 4 |
3 | -4 |
4 | 16 |
5 | -28 |
6 | 72 |
7 | -148 |
8 | 336 |
9 | -716 |
10 | 1560 |
11 | -3332 |
12 | 7136 |
13 | -15164 |
14 | 32168 |
15 | -67956 |
16 | 143216 |
17 | -300972 |
18 | 631096 |
19 | -1320420 |
20 | 2757376 |
21 | -5747740 |
22 | 11961544 |
23 | -24855124 |
24 | 51574416 |
25 | -106877068 |
26 | 221210712 |
27 | -457334468 |
28 | 944495136 |
29 | -1948642556 |
[1,0,4,-4,16,-28,72,-148,336,-716,1560,-3332,7136, -15164,32168,-67956,143216,-300972,631096, -1320420,2757376,-5747740,11961544,-24855124, 51574416,-106877068,221210712,-457334468, 944495136,-1948642556] |