n | a(n) |
---|---|
0 | 1 |
1 | -2 |
2 | 5 |
3 | -12 |
4 | 30 |
5 | -73 |
6 | 180 |
7 | -444 |
8 | 1095 |
9 | -2699 |
10 | 6653 |
11 | -16399 |
12 | 40421 |
13 | -99632 |
14 | 245580 |
15 | -605324 |
16 | 1492048 |
17 | -3677712 |
18 | 9065100 |
19 | -22344336 |
20 | 55075988 |
21 | -135755408 |
22 | 334620068 |
23 | -824796535 |
24 | 2033020102 |
25 | -5011139791 |
26 | 12351831632 |
27 | -30445717146 |
[1,-2,5,-12,30,-73,180,-444,1095,-2699,6653, -16399,40421,-99632,245580,-605324,1492048, -3677712,9065100,-22344336,55075988,-135755408, 334620068,-824796535,2033020102,-5011139791, 12351831632,-30445717146] |