n | a(n) |
---|---|
0 | 1 |
1 | -2 |
2 | 2 |
3 | -4 |
4 | 2 |
5 | -12 |
6 | -12 |
7 | -72 |
8 | -190 |
9 | -700 |
10 | -2308 |
11 | -8120 |
12 | -28364 |
13 | -100856 |
14 | -360792 |
15 | -1301904 |
16 | -4727358 |
17 | -17268636 |
18 | -63405012 |
19 | -233885784 |
20 | -866327748 |
21 | -3220976616 |
22 | -12016209192 |
23 | -44966763504 |
24 | -168750724428 |
25 | -634935132312 |
26 | -2394717424552 |
27 | -9051945482032 |
[1,-2,2,-4,2,-12,-12,-72,-190,-700,-2308,-8120, -28364,-100856,-360792,-1301904,-4727358, -17268636,-63405012,-233885784,-866327748, -3220976616,-12016209192,-44966763504, -168750724428,-634935132312,-2394717424552, -9051945482032] |