n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 2 |
4 | 8 |
5 | 21 |
6 | 56 |
7 | 180 |
8 | 537 |
9 | 1642 |
10 | 5428 |
11 | 16894 |
12 | 56073 |
13 | 184644 |
14 | 608722 |
15 | 2060761 |
16 | 6912591 |
17 | 23511436 |
18 | 80469490 |
19 | 275394728 |
20 | 951992172 |
21 | 3293896039 |
22 | 11446970617 |
23 | 39969401778 |
24 | 139770090303 |
25 | 490850856487 |
26 | 1727806323657 |
27 | 6096204817107 |
28 | 21572269339099 |
29 | 76472370379535 |
30 | 271723970484170 |
31 | 967416967381241 |
[1,0,2,2,8,21,56,180,537,1642,5428,16894,56073, 184644,608722,2060761,6912591,23511436,80469490, 275394728,951992172,3293896039,11446970617, 39969401778,139770090303,490850856487, 1727806323657,6096204817107,21572269339099, 76472370379535,271723970484170,967416967381241] |