n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 10 |
5 | 44 |
6 | 249 |
7 | 1513 |
8 | 10002 |
9 | 68455 |
10 | 482571 |
11 | 3470782 |
12 | 25391403 |
13 | 188353848 |
14 | 1414150643 |
15 | 10728851795 |
16 | 82151290333 |
17 | 634203702080 |
18 | 4931994064073 |
19 | 38607981904156 |
20 | 304032521364835 |
[1,1,3,10,44,249,1513,10002,68455,482571,3470782, 25391403,188353848,1414150643,10728851795, 82151290333,634203702080,4931994064073, 38607981904156,304032521364835] |