n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 0 |
4 | -12 |
5 | -68 |
6 | -208 |
7 | -56 |
8 | 3472 |
9 | 26272 |
10 | 119072 |
11 | 234432 |
12 | -1600896 |
13 | -22177088 |
14 | -159056896 |
15 | -769693952 |
16 | -1571891456 |
17 | 16806915328 |
18 | 276758503424 |
19 | 2610810796032 |
20 | 18627861722112 |
21 | 94941413343232 |
22 | 121510785658880 |
[1,2,0,-12,-68,-208,-56,3472,26272,119072,234432, -1600896,-22177088,-159056896,-769693952, -1571891456,16806915328,276758503424, 2610810796032,18627861722112,94941413343232, 121510785658880] |