n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 6 |
6 | 16 |
7 | 36 |
8 | 106 |
9 | 443 |
10 | 1796 |
11 | 6161 |
12 | 23816 |
13 | 122266 |
14 | 643644 |
15 | 2934296 |
16 | 14002237 |
17 | 83835433 |
18 | 532282819 |
19 | 3005258539 |
20 | 17039094646 |
21 | 115611682810 |
22 | 848428608644 |
23 | 5682350940168 |
24 | 37297365940462 |
25 | 281594230420802 |
26 | 2323660209441962 |
27 | 17929392395804072 |
[1,1,1,1,2,6,16,36,106,443,1796,6161,23816,122266, 643644,2934296,14002237,83835433,532282819, 3005258539,17039094646,115611682810,848428608644, 5682350940168,37297365940462,281594230420802, 2323660209441962,17929392395804072] |