n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 15 |
4 | 53 |
5 | 217 |
6 | 1015 |
7 | 5355 |
8 | 31513 |
9 | 204857 |
10 | 1458875 |
11 | 11299695 |
12 | 94600373 |
13 | 851419597 |
14 | 8198959735 |
15 | 84124450035 |
16 | 916270051633 |
17 | 10559066809937 |
18 | 128362804540595 |
19 | 1641730799916375 |
20 | 22037407161945293 |
21 | 309782122281453877 |
22 | 4551072446448773455 |
23 | 69747642031977698715 |
[1,2,5,15,53,217,1015,5355,31513,204857,1458875, 11299695,94600373,851419597,8198959735, 84124450035,916270051633,10559066809937, 128362804540595,1641730799916375, 22037407161945293,309782122281453877, 4551072446448773455,69747642031977698715] |