n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 0 |
3 | 4 |
4 | -12 |
5 | 71 |
6 | -420 |
7 | 2962 |
8 | -23688 |
9 | 213229 |
10 | -2132280 |
11 | 23455136 |
12 | -281461620 |
13 | 3659001139 |
14 | -51226015932 |
15 | 768390239086 |
16 | -12294243825360 |
17 | 209002145031257 |
18 | -3762038610562608 |
19 | 71478733600689724 |
20 | -1429574672013794460 |
[0,1,0,4,-12,71,-420,2962,-23688,213229,-2132280, 23455136,-281461620,3659001139,-51226015932, 768390239086,-12294243825360,209002145031257, -3762038610562608,71478733600689724, -1429574672013794460] |