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