n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 4 |
5 | 12 |
6 | 27 |
7 | 78 |
8 | 208 |
9 | 635 |
10 | 1859 |
11 | 5726 |
12 | 17526 |
13 | 54620 |
14 | 170479 |
15 | 536714 |
16 | 1694567 |
17 | 5376764 |
18 | 17110286 |
19 | 54631302 |
20 | 174879997 |
21 | 561229678 |
22 | 1805022806 |
[1,1,3,4,12,27,78,208,635,1859,5726,17526,54620, 170479,536714,1694567,5376764,17110286,54631302, 174879997,561229678,1805022806] |