n | a(n) |
---|---|
0 | 0 |
1 | -2 |
2 | 6 |
3 | -18 |
4 | 46 |
5 | -114 |
6 | 270 |
7 | -626 |
8 | 1422 |
9 | -3186 |
10 | 7054 |
11 | -15474 |
12 | 33678 |
13 | -72818 |
14 | 156558 |
15 | -334962 |
16 | 713614 |
17 | -1514610 |
18 | 3203982 |
19 | -6757490 |
20 | 14214030 |
21 | -29826162 |
22 | 62448526 |
23 | -130489458 |
24 | 272163726 |
25 | -566697074 |
26 | 1178133390 |
27 | -2445745266 |
28 | 5070447502 |
29 | -10498808946 |
30 | 21713445774 |
[0,-2,6,-18,46,-114,270,-626,1422,-3186,7054, -15474,33678,-72818,156558,-334962,713614, -1514610,3203982,-6757490,14214030,-29826162, 62448526,-130489458,272163726,-566697074, 1178133390,-2445745266,5070447502,-10498808946, 21713445774] |