n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 12 |
5 | 32 |
6 | 89 |
7 | 246 |
8 | 685 |
9 | 1912 |
10 | 5355 |
11 | 15038 |
12 | 42339 |
13 | 119484 |
14 | 337935 |
15 | 957738 |
16 | 2719539 |
17 | 7736208 |
18 | 22044444 |
19 | 62916696 |
20 | 179841270 |
21 | 514793944 |
22 | 1475586687 |
23 | 4234989242 |
24 | 12169352003 |
25 | 35009302296 |
26 | 100826681530 |
27 | 290683486132 |
28 | 838873595124 |
[1,1,2,4,12,32,89,246,685,1912,5355,15038,42339, 119484,337935,957738,2719539,7736208,22044444, 62916696,179841270,514793944,1475586687, 4234989242,12169352003,35009302296,100826681530, 290683486132,838873595124] |