n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | -2 |
3 | 6 |
4 | -20 |
5 | 80 |
6 | -366 |
7 | 1904 |
8 | -11080 |
9 | 71424 |
10 | -505210 |
11 | 3891712 |
12 | -32433180 |
13 | 290787328 |
14 | -2791053734 |
15 | 28556359680 |
16 | -310264194320 |
17 | 3567710830592 |
18 | -43287834157938 |
19 | 552688817143808 |
20 | -7407423764750500 |
21 | 103981459115606016 |
22 | -1525675236649033822 |
23 | 23354749389657604096 |
[0,1,-2,6,-20,80,-366,1904,-11080,71424,-505210, 3891712,-32433180,290787328,-2791053734, 28556359680,-310264194320,3567710830592, -43287834157938,552688817143808,-7407423764750500, 103981459115606016,-1525675236649033822, 23354749389657604096] |