n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 17 |
4 | 80 |
5 | 365 |
6 | 1981 |
7 | 11222 |
8 | 69511 |
9 | 455663 |
10 | 3169244 |
11 | 23170347 |
12 | 177513359 |
13 | 1418920570 |
14 | 11798710013 |
15 | 101778754655 |
16 | 908722427531 |
17 | 8380602471646 |
18 | 79692654473866 |
19 | 780142956502644 |
20 | 7851084073063731 |
21 | 81120767066417308 |
[1,1,5,17,80,365,1981,11222,69511,455663,3169244, 23170347,177513359,1418920570,11798710013, 101778754655,908722427531,8380602471646, 79692654473866,780142956502644,7851084073063731, 81120767066417308] |