n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 16 |
5 | 56 |
6 | 221 |
7 | 900 |
8 | 3839 |
9 | 16752 |
10 | 74701 |
11 | 338327 |
12 | 1553181 |
13 | 7208191 |
14 | 33768389 |
15 | 159463655 |
16 | 758291989 |
17 | 3627890869 |
18 | 17450572584 |
19 | 84342086908 |
20 | 409394388458 |
21 | 1994883122360 |
22 | 9754673396640 |
23 | 47850963112328 |
24 | 235413886888082 |
25 | 1161267995487057 |
26 | 5742484341773444 |
[0,1,2,5,16,56,221,900,3839,16752,74701,338327, 1553181,7208191,33768389,159463655,758291989, 3627890869,17450572584,84342086908,409394388458, 1994883122360,9754673396640,47850963112328, 235413886888082,1161267995487057,5742484341773444] |