n | a(n) |
---|---|
0 | 1 |
1 | -2 |
2 | 5 |
3 | -11 |
4 | 26 |
5 | -53 |
6 | 104 |
7 | -198 |
8 | 375 |
9 | -700 |
10 | 1299 |
11 | -2401 |
12 | 4432 |
13 | -8167 |
14 | 15038 |
15 | -27676 |
16 | 50925 |
17 | -93686 |
18 | 172337 |
19 | -316999 |
20 | 583078 |
21 | -1072473 |
22 | 1972612 |
23 | -3628226 |
24 | 6673379 |
25 | -12274288 |
26 | 22575967 |
27 | -41523709 |
28 | 76374044 |
29 | -140473803 |
30 | 258371642 |
[1,-2,5,-11,26,-53,104,-198,375,-700,1299,-2401, 4432,-8167,15038,-27676,50925,-93686,172337, -316999,583078,-1072473,1972612,-3628226,6673379, -12274288,22575967,-41523709,76374044,-140473803, 258371642] |