n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 11 |
5 | 27 |
6 | 92 |
7 | 252 |
8 | 906 |
9 | 2787 |
10 | 10191 |
11 | 31594 |
12 | 125998 |
13 | 393021 |
14 | 1535964 |
15 | 5161328 |
16 | 20221291 |
17 | 66306664 |
18 | 273756969 |
19 | 897440988 |
20 | 3664037417 |
21 | 12621555612 |
22 | 50496343297 |
23 | 170909672792 |
24 | 725703552284 |
25 | 2427269270146 |
26 | 9982179588261 |
27 | 35179417316991 |
28 | 143999051236064 |
[1,1,2,4,11,27,92,252,906,2787,10191,31594,125998, 393021,1535964,5161328,20221291,66306664, 273756969,897440988,3664037417,12621555612, 50496343297,170909672792,725703552284, 2427269270146,9982179588261,35179417316991, 143999051236064] |