n | a(n) |
---|---|
0 | 1 |
1 | -7 |
2 | 18 |
3 | -24 |
4 | 24 |
5 | 6 |
6 | 66 |
7 | 258 |
8 | 1014 |
9 | 3906 |
10 | 14760 |
11 | 54696 |
12 | 198510 |
13 | 704010 |
14 | 2431110 |
15 | 8130096 |
16 | 26103624 |
17 | 79292226 |
18 | 221534442 |
19 | 532863372 |
20 | 870102906 |
21 | -842584128 |
22 | -17420140980 |
23 | -111985825752 |
24 | -559952980782 |
25 | -2460921694668 |
26 | -9861404819574 |
27 | -36339628229910 |
[1,-7,18,-24,24,6,66,258,1014,3906,14760,54696, 198510,704010,2431110,8130096,26103624,79292226, 221534442,532863372,870102906,-842584128, -17420140980,-111985825752,-559952980782, -2460921694668,-9861404819574,-36339628229910] |