n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 9 |
5 | 22 |
6 | 58 |
7 | 163 |
8 | 485 |
9 | 1519 |
10 | 4985 |
11 | 17077 |
12 | 60871 |
13 | 225152 |
14 | 862150 |
15 | 3410641 |
16 | 13913800 |
17 | 58440010 |
18 | 252348913 |
19 | 1118802690 |
20 | 5086910935 |
21 | 23693925911 |
22 | 112947299251 |
23 | 550527774738 |
24 | 2741489275969 |
25 | 13936841789100 |
26 | 72277551806634 |
27 | 382134348251357 |
28 | 2058420014680378 |
[1,1,2,4,9,22,58,163,485,1519,4985,17077,60871, 225152,862150,3410641,13913800,58440010,252348913, 1118802690,5086910935,23693925911,112947299251, 550527774738,2741489275969,13936841789100, 72277551806634,382134348251357,2058420014680378] |