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