n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 6 |
4 | 24 |
5 | 70 |
6 | 180 |
7 | 434 |
8 | 1008 |
9 | 2286 |
10 | 5100 |
11 | 11242 |
12 | 24552 |
13 | 53222 |
14 | 114660 |
15 | 245730 |
16 | 524256 |
17 | 1114078 |
18 | 2359260 |
19 | 4980698 |
20 | 10485720 |
21 | 22020054 |
22 | 46137300 |
23 | 96468946 |
24 | 201326544 |
25 | 419430350 |
26 | 872415180 |
27 | 1811939274 |
28 | 3758096328 |
29 | 7784628166 |
30 | 16106127300 |
31 | 33285996482 |
[0,0,0,6,24,70,180,434,1008,2286,5100,11242,24552, 53222,114660,245730,524256,1114078,2359260, 4980698,10485720,22020054,46137300,96468946, 201326544,419430350,872415180,1811939274, 3758096328,7784628166,16106127300,33285996482] |