n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 14 |
5 | 51 |
6 | 187 |
7 | 820 |
8 | 3670 |
9 | 18191 |
10 | 97917 |
11 | 554500 |
12 | 3334465 |
13 | 20871592 |
14 | 138440031 |
15 | 972083845 |
16 | 6985171390 |
17 | 52194795327 |
18 | 412903730293 |
19 | 3313067916192 |
20 | 28017395030419 |
21 | 241504438776956 |
22 | 2189375704925081 |
23 | 19771679215526507 |
24 | 187677937412341677 |
[1,1,2,5,14,51,187,820,3670,18191,97917,554500, 3334465,20871592,138440031,972083845,6985171390, 52194795327,412903730293,3313067916192, 28017395030419,241504438776956,2189375704925081, 19771679215526507,187677937412341677] |