n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 0 |
3 | 2 |
4 | 4 |
5 | 10 |
6 | 18 |
7 | 42 |
8 | 80 |
9 | 168 |
10 | 330 |
11 | 682 |
12 | 1340 |
13 | 2730 |
14 | 5418 |
15 | 10910 |
16 | 21760 |
17 | 43690 |
18 | 87192 |
19 | 174762 |
20 | 349180 |
21 | 699006 |
22 | 1397418 |
23 | 2796202 |
24 | 5590960 |
25 | 11184800 |
26 | 22366890 |
27 | 44739072 |
28 | 89473020 |
29 | 178956970 |
30 | 357902670 |
31 | 715827882 |
32 | 1431633920 |
33 | 2863310846 |
[0,1,0,2,4,10,18,42,80,168,330,682,1340,2730,5418, 10910,21760,43690,87192,174762,349180,699006, 1397418,2796202,5590960,11184800,22366890, 44739072,89473020,178956970,357902670,715827882, 1431633920,2863310846] |