n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 20 |
4 | 98 |
5 | 502 |
6 | 2126 |
7 | 8382 |
8 | 39624 |
9 | 203562 |
10 | 922944 |
11 | 3886840 |
12 | 18431462 |
13 | 93930404 |
14 | 435553556 |
15 | 1893481706 |
16 | 9028569112 |
17 | 45794495192 |
18 | 214665970468 |
19 | 950426429104 |
20 | 4550599324520 |
21 | 23012148707800 |
22 | 108579819367298 |
23 | 486522336711212 |
24 | 2336288831626038 |
25 | 11788749319436714 |
[1,2,6,20,98,502,2126,8382,39624,203562,922944, 3886840,18431462,93930404,435553556,1893481706, 9028569112,45794495192,214665970468,950426429104, 4550599324520,23012148707800,108579819367298, 486522336711212,2336288831626038, 11788749319436714] |