n | a(n) |
---|---|
1 | 2 |
2 | 4 |
3 | 31 |
4 | 96 |
5 | 424 |
6 | 1422 |
7 | 5504 |
8 | 19606 |
9 | 73294 |
10 | 266630 |
11 | 985354 |
12 | 3607564 |
13 | 13279027 |
14 | 48721400 |
15 | 179090319 |
16 | 657572014 |
17 | 2415928734 |
18 | 8872778822 |
19 | 32593085529 |
20 | 119711114434 |
21 | 439717298204 |
22 | 1615076013180 |
23 | 5932289053689 |
24 | 21789374848574 |
[2,4,31,96,424,1422,5504,19606,73294,266630, 985354,3607564,13279027,48721400,179090319, 657572014,2415928734,8872778822,32593085529, 119711114434,439717298204,1615076013180, 5932289053689,21789374848574] |