n | a(n) |
---|---|
0 | 1 |
1 | -1 |
2 | 2 |
3 | -5 |
4 | 14 |
5 | -42 |
6 | 132 |
7 | -429 |
8 | 1430 |
9 | -4862 |
10 | 16796 |
11 | -58786 |
12 | 208012 |
13 | -742900 |
14 | 2674440 |
15 | -9694845 |
16 | 35357670 |
17 | -129644790 |
18 | 477638700 |
19 | -1767263190 |
20 | 6564120420 |
21 | -24466267020 |
22 | 91482563640 |
23 | -343059613650 |
24 | 1289904147324 |
25 | -4861946401452 |
26 | 18367353072152 |
27 | -69533550916004 |
[1,-1,2,-5,14,-42,132,-429,1430,-4862,16796, -58786,208012,-742900,2674440,-9694845,35357670, -129644790,477638700,-1767263190,6564120420, -24466267020,91482563640,-343059613650, 1289904147324,-4861946401452,18367353072152, -69533550916004] |