n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 0 |
4 | 6 |
5 | 2 |
6 | 20 |
7 | 14 |
8 | 70 |
9 | 72 |
10 | 254 |
11 | 330 |
12 | 948 |
13 | 1430 |
14 | 3614 |
15 | 6008 |
16 | 13990 |
17 | 24786 |
18 | 54740 |
19 | 101118 |
20 | 215766 |
21 | 409640 |
22 | 854702 |
23 | 1652090 |
24 | 3396916 |
25 | 6643782 |
26 | 13530350 |
27 | 26667864 |
28 | 53971350 |
29 | 106914242 |
30 | 215492564 |
31 | 428292590 |
32 | 860941798 |
[1,0,2,0,6,2,20,14,70,72,254,330,948,1430,3614, 6008,13990,24786,54740,101118,215766,409640, 854702,1652090,3396916,6643782,13530350,26667864, 53971350,106914242,215492564,428292590,860941798] |