n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 50 |
6 | 177 |
7 | 650 |
8 | 2449 |
9 | 9412 |
10 | 36761 |
11 | 145518 |
12 | 582556 |
13 | 2354557 |
14 | 9594898 |
15 | 39378259 |
16 | 162619316 |
17 | 675258452 |
18 | 2817643240 |
19 | 11808576745 |
20 | 49683880754 |
21 | 209786559004 |
22 | 888676860191 |
23 | 3775654643360 |
24 | 16084818268474 |
25 | 68694452578325 |
26 | 294053067958011 |
[1,1,2,5,15,50,177,650,2449,9412,36761,145518, 582556,2354557,9594898,39378259,162619316, 675258452,2817643240,11808576745,49683880754, 209786559004,888676860191,3775654643360, 16084818268474,68694452578325,294053067958011] |