n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 18 |
5 | 62 |
6 | 228 |
7 | 869 |
8 | 3410 |
9 | 13663 |
10 | 55689 |
11 | 230276 |
12 | 963851 |
13 | 4076429 |
14 | 17394641 |
15 | 74798044 |
16 | 323797908 |
17 | 1409980003 |
18 | 6171824159 |
19 | 27141256911 |
20 | 119854448404 |
21 | 531261779875 |
22 | 2362873352568 |
23 | 10541865261557 |
24 | 47165485163426 |
25 | 211572830443060 |
26 | 951338664998601 |
27 | 4287174496933723 |
[1,1,2,6,18,62,228,869,3410,13663,55689,230276, 963851,4076429,17394641,74798044,323797908, 1409980003,6171824159,27141256911,119854448404, 531261779875,2362873352568,10541865261557, 47165485163426,211572830443060,951338664998601, 4287174496933723] |