n | a(n) |
---|---|
0 | 1 |
1 | -2 |
2 | -6 |
3 | -28 |
4 | -154 |
5 | -924 |
6 | -5852 |
7 | -38456 |
8 | -259578 |
9 | -1788204 |
10 | -12517428 |
11 | -88759944 |
12 | -636112932 |
13 | -4599585816 |
14 | -33511268088 |
15 | -245749299312 |
16 | -1812401082426 |
17 | -13433090375628 |
18 | -100001895018564 |
19 | -747382583822952 |
20 | -5605369378672140 |
21 | -42173731515723720 |
[1,-2,-6,-28,-154,-924,-5852,-38456,-259578, -1788204,-12517428,-88759944,-636112932, -4599585816,-33511268088,-245749299312, -1812401082426,-13433090375628,-100001895018564, -747382583822952,-5605369378672140, -42173731515723720] |