n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 4 |
6 | 15 |
7 | 40 |
8 | 103 |
9 | 238 |
10 | 531 |
11 | 1131 |
12 | 2362 |
13 | 4811 |
14 | 9694 |
15 | 19307 |
16 | 38243 |
17 | 75400 |
18 | 148443 |
19 | 291984 |
20 | 574724 |
21 | 1132368 |
22 | 2234617 |
23 | 4416937 |
24 | 8745567 |
25 | 17343737 |
26 | 34446090 |
27 | 68500682 |
28 | 136374947 |
29 | 271755878 |
30 | 541950747 |
31 | 1081467319 |
32 | 2159170372 |
33 | 4312555339 |
34 | 8616279482 |
35 | 17219151572 |
36 | 34418065540 |
37 | 68805730450 |
38 | 137566021077 |
[1,0,0,0,1,4,15,40,103,238,531,1131,2362,4811, 9694,19307,38243,75400,148443,291984,574724, 1132368,2234617,4416937,8745567,17343737,34446090, 68500682,136374947,271755878,541950747,1081467319, 2159170372,4312555339,8616279482,17219151572, 34418065540,68805730450,137566021077] |