n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 7 |
4 | 21 |
5 | 57 |
6 | 182 |
7 | 565 |
8 | 1931 |
9 | 6670 |
10 | 24537 |
11 | 92337 |
12 | 364602 |
13 | 1477148 |
14 | 6219031 |
15 | 26875932 |
16 | 119930947 |
17 | 548688443 |
18 | 2580814003 |
19 | 12425175838 |
20 | 61302331782 |
21 | 309055818656 |
[1,1,3,7,21,57,182,565,1931,6670,24537,92337, 364602,1477148,6219031,26875932,119930947, 548688443,2580814003,12425175838,61302331782, 309055818656] |