n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 2 |
6 | 10 |
7 | 44 |
8 | 190 |
9 | 856 |
10 | 4106 |
11 | 21092 |
12 | 115886 |
13 | 678426 |
14 | 4213364 |
15 | 27644060 |
16 | 190898712 |
17 | 1382957558 |
18 | 10480140550 |
19 | 82864867220 |
20 | 682076801978 |
21 | 5832742198292 |
22 | 51724158224426 |
23 | 474869816139040 |
24 | 4506715738418666 |
[1,1,0,0,0,2,10,44,190,856,4106,21092,115886, 678426,4213364,27644060,190898712,1382957558, 10480140550,82864867220,682076801978, 5832742198292,51724158224426,474869816139040, 4506715738418666] |