n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 0 |
4 | 2 |
5 | 2 |
6 | 8 |
7 | 8 |
8 | 34 |
9 | 60 |
10 | 203 |
11 | 553 |
12 | 2063 |
13 | 7359 |
14 | 30811 |
15 | 127416 |
16 | 541644 |
17 | 2235677 |
18 | 8966371 |
19 | 34413747 |
20 | 126465849 |
21 | 443858877 |
22 | 1490702752 |
23 | 4796609651 |
24 | 14821521743 |
25 | 44071296447 |
26 | 126388352322 |
27 | 350298687803 |
28 | 940211047828 |
[1,0,1,0,2,2,8,8,34,60,203,553,2063,7359,30811, 127416,541644,2235677,8966371,34413747,126465849, 443858877,1490702752,4796609651,14821521743, 44071296447,126388352322,350298687803, 940211047828] |