n | a(n) |
---|---|
1 | 1 |
2 | -2 |
3 | 5 |
4 | -12 |
5 | 33 |
6 | -78 |
7 | 261 |
8 | -360 |
9 | 3681 |
10 | 13446 |
11 | 193509 |
12 | 1951452 |
13 | 23948865 |
14 | 309740922 |
15 | 4341155877 |
16 | 65102989248 |
17 | 1041690874689 |
18 | 17708615729550 |
19 | 318755470552389 |
20 | 6056352778233924 |
21 | 121127059051462881 |
22 | 2543668229620367298 |
[1,-2,5,-12,33,-78,261,-360,3681,13446,193509, 1951452,23948865,309740922,4341155877,65102989248, 1041690874689,17708615729550,318755470552389, 6056352778233924,121127059051462881, 2543668229620367298] |