n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 9 |
4 | 37 |
5 | 156 |
6 | 695 |
7 | 3203 |
8 | 15118 |
9 | 72739 |
10 | 355475 |
11 | 1759624 |
12 | 8804341 |
13 | 44457125 |
14 | 226256114 |
15 | 1159387253 |
16 | 5976713665 |
17 | 30974296468 |
18 | 161285018771 |
19 | 843388543471 |
20 | 4427120165182 |
21 | 23319497761799 |
22 | 123221525405447 |
23 | 652989260163472 |
[1,1,2,9,37,156,695,3203,15118,72739,355475, 1759624,8804341,44457125,226256114,1159387253, 5976713665,30974296468,161285018771,843388543471, 4427120165182,23319497761799,123221525405447, 652989260163472] |