n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 16 |
5 | 46 |
6 | 140 |
7 | 435 |
8 | 1382 |
9 | 4474 |
10 | 14687 |
11 | 48787 |
12 | 163703 |
13 | 554009 |
14 | 1888794 |
15 | 6481220 |
16 | 22366415 |
17 | 77575617 |
18 | 270277602 |
19 | 945480612 |
20 | 3319582632 |
21 | 11693824752 |
22 | 41318554495 |
23 | 146399071577 |
24 | 520042511448 |
25 | 1851657641932 |
26 | 6607352892709 |
27 | 23624965371264 |
[1,1,2,6,16,46,140,435,1382,4474,14687,48787, 163703,554009,1888794,6481220,22366415,77575617, 270277602,945480612,3319582632,11693824752, 41318554495,146399071577,520042511448, 1851657641932,6607352892709,23624965371264] |