n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 9 |
3 | 38 |
4 | 161 |
5 | 682 |
6 | 2889 |
7 | 12238 |
8 | 51841 |
9 | 219602 |
10 | 930249 |
11 | 3940598 |
12 | 16692641 |
13 | 70711162 |
14 | 299537289 |
15 | 1268860318 |
16 | 5374978561 |
17 | 22768774562 |
18 | 96450076809 |
19 | 408569081798 |
20 | 1730726404001 |
21 | 7331474697802 |
22 | 31056625195209 |
[1,2,9,38,161,682,2889,12238,51841,219602,930249, 3940598,16692641,70711162,299537289,1268860318, 5374978561,22768774562,96450076809,408569081798, 1730726404001,7331474697802,31056625195209] |