n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 19 |
5 | 63 |
6 | 228 |
7 | 853 |
8 | 3303 |
9 | 13129 |
10 | 53284 |
11 | 219809 |
12 | 920251 |
13 | 3898392 |
14 | 16683106 |
15 | 72047117 |
16 | 313513987 |
17 | 1373636939 |
18 | 6054897529 |
19 | 26832276225 |
20 | 119480099586 |
21 | 534329193514 |
22 | 2398901718584 |
23 | 10808275537214 |
24 | 48854155081710 |
25 | 221476765120080 |
26 | 1006775733279628 |
27 | 4587970914295101 |
28 | 20956052719317802 |
[1,1,2,6,19,63,228,853,3303,13129,53284,219809, 920251,3898392,16683106,72047117,313513987, 1373636939,6054897529,26832276225,119480099586, 534329193514,2398901718584,10808275537214, 48854155081710,221476765120080,1006775733279628, 4587970914295101,20956052719317802] |