n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | -1 |
3 | -4 |
4 | 9 |
5 | 60 |
6 | -175 |
7 | -2154 |
8 | 6433 |
9 | 140984 |
10 | -404063 |
11 | -14300174 |
12 | 38333361 |
13 | 2070386084 |
14 | -5007071823 |
15 | -406148697538 |
16 | 844312637249 |
17 | 103808494182512 |
18 | -173366392362431 |
19 | -33528470038125974 |
20 | 40208654504239441 |
[1,1,-1,-4,9,60,-175,-2154,6433,140984,-404063, -14300174,38333361,2070386084,-5007071823, -406148697538,844312637249,103808494182512, -173366392362431,-33528470038125974, 40208654504239441] |