n | a(n) |
---|---|
1 | 2 |
2 | 3 |
3 | 10 |
4 | 41 |
5 | 180 |
6 | 873 |
7 | 4406 |
8 | 23226 |
9 | 125722 |
10 | 696139 |
11 | 3920842 |
12 | 22398781 |
13 | 129445934 |
14 | 755446276 |
15 | 4445631466 |
16 | 26350577022 |
17 | 157171541470 |
18 | 942671178054 |
19 | 5681706775452 |
20 | 34395634415206 |
21 | 209045930188038 |
[2,3,10,41,180,873,4406,23226,125722,696139, 3920842,22398781,129445934,755446276,4445631466, 26350577022,157171541470,942671178054, 5681706775452,34395634415206,209045930188038] |