n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 0 |
4 | 2 |
5 | 1 |
6 | 6 |
7 | 5 |
8 | 20 |
9 | 21 |
10 | 70 |
11 | 84 |
12 | 252 |
13 | 330 |
14 | 924 |
15 | 1287 |
16 | 3432 |
17 | 5005 |
18 | 12870 |
19 | 19448 |
20 | 48620 |
21 | 75582 |
22 | 184756 |
23 | 293930 |
24 | 705432 |
25 | 1144066 |
26 | 2704156 |
27 | 4457400 |
28 | 10400600 |
29 | 17383860 |
30 | 40116600 |
31 | 67863915 |
32 | 155117520 |
33 | 265182525 |
34 | 601080390 |
35 | 1037158320 |
36 | 2333606220 |
37 | 4059928950 |
38 | 9075135300 |
[1,0,1,0,2,1,6,5,20,21,70,84,252,330,924,1287, 3432,5005,12870,19448,48620,75582,184756,293930, 705432,1144066,2704156,4457400,10400600,17383860, 40116600,67863915,155117520,265182525,601080390, 1037158320,2333606220,4059928950,9075135300] |