n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | -1 |
3 | -1 |
4 | 2 |
5 | 2 |
6 | -5 |
7 | -5 |
8 | 14 |
9 | 14 |
10 | -42 |
11 | -42 |
12 | 132 |
13 | 132 |
14 | -429 |
15 | -429 |
16 | 1430 |
17 | 1430 |
18 | -4862 |
19 | -4862 |
20 | 16796 |
21 | 16796 |
22 | -58786 |
23 | -58786 |
24 | 208012 |
25 | 208012 |
26 | -742900 |
27 | -742900 |
28 | 2674440 |
29 | 2674440 |
30 | -9694845 |
31 | -9694845 |
32 | 35357670 |
33 | 35357670 |
34 | -129644790 |
35 | -129644790 |
36 | 477638700 |
37 | 477638700 |
38 | -1767263190 |
39 | -1767263190 |
[0,1,-1,-1,2,2,-5,-5,14,14,-42,-42,132,132,-429, -429,1430,1430,-4862,-4862,16796,16796,-58786, -58786,208012,208012,-742900,-742900,2674440, 2674440,-9694845,-9694845,35357670,35357670, -129644790,-129644790,477638700,477638700, -1767263190,-1767263190] |