n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 33 |
5 | 137 |
6 | 619 |
7 | 3017 |
8 | 15617 |
9 | 84625 |
10 | 474771 |
11 | 2723721 |
12 | 15730209 |
13 | 89487257 |
14 | 482793211 |
15 | 2259370697 |
16 | 6292321025 |
17 | -41172399839 |
18 | -1066104760797 |
19 | -14517156416247 |
20 | -163539106749663 |
21 | -1652237279663959 |
22 | -15169567281615221 |
[1,1,3,9,33,137,619,3017,15617,84625,474771, 2723721,15730209,89487257,482793211,2259370697, 6292321025,-41172399839,-1066104760797, -14517156416247,-163539106749663, -1652237279663959,-15169567281615221] |