n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 10 |
5 | 39 |
6 | 160 |
7 | 691 |
8 | 3081 |
9 | 14095 |
10 | 65757 |
11 | 311695 |
12 | 1496833 |
13 | 7266979 |
14 | 35608419 |
15 | 175875537 |
16 | 874698246 |
17 | 4376646808 |
18 | 22016578909 |
19 | 111282845162 |
20 | 564886771380 |
21 | 2878498888625 |
22 | 14719219809915 |
23 | 75505990358779 |
24 | 388451973679785 |
[1,1,3,10,39,160,691,3081,14095,65757,311695, 1496833,7266979,35608419,175875537,874698246, 4376646808,22016578909,111282845162,564886771380, 2878498888625,14719219809915,75505990358779, 388451973679785] |