n | a(n) |
---|---|
0 | 0 |
1 | -1 |
2 | -1 |
3 | 0 |
4 | 6 |
5 | 34 |
6 | 150 |
7 | 548 |
8 | 1064 |
9 | -9620 |
10 | -190980 |
11 | -2379408 |
12 | -26412408 |
13 | -281137848 |
14 | -2923819080 |
15 | -29496805392 |
16 | -277842087360 |
17 | -2151448802448 |
18 | -5085750338064 |
19 | 334794720634752 |
20 | 11987850975483360 |
[0,-1,-1,0,6,34,150,548,1064,-9620,-190980, -2379408,-26412408,-281137848,-2923819080, -29496805392,-277842087360,-2151448802448, -5085750338064,334794720634752,11987850975483360] |