n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 22 |
6 | 89 |
7 | 380 |
8 | 1679 |
9 | 7602 |
10 | 35072 |
11 | 164266 |
12 | 779022 |
13 | 3733444 |
14 | 18053457 |
15 | 87977300 |
16 | 431628390 |
17 | 2130222854 |
18 | 10568712275 |
19 | 52681070700 |
20 | 263702193164 |
21 | 1325015897814 |
22 | 6680716274936 |
23 | 33789860569680 |
24 | 171393770952775 |
[1,1,2,6,22,89,380,1679,7602,35072,164266,779022, 3733444,18053457,87977300,431628390,2130222854, 10568712275,52681070700,263702193164, 1325015897814,6680716274936,33789860569680, 171393770952775] |