n | a(n) |
---|---|
1 | 1 |
2 | 7 |
3 | 34 |
4 | 143 |
5 | 560 |
6 | 2108 |
7 | 7752 |
8 | 28101 |
9 | 100947 |
10 | 360526 |
11 | 1282735 |
12 | 4552624 |
13 | 16131656 |
14 | 57099056 |
15 | 201962057 |
16 | 714012495 |
17 | 2523515514 |
18 | 8916942687 |
19 | 31504028992 |
20 | 111295205284 |
21 | 393151913464 |
22 | 1388758662221 |
23 | 4905479957435 |
24 | 17327203698086 |
25 | 61202661233823 |
26 | 216176614077600 |
[1,7,34,143,560,2108,7752,28101,100947,360526, 1282735,4552624,16131656,57099056,201962057, 714012495,2523515514,8916942687,31504028992, 111295205284,393151913464,1388758662221, 4905479957435,17327203698086,61202661233823, 216176614077600] |