n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 11 |
4 | 40 |
5 | 122 |
6 | 410 |
7 | 1270 |
8 | 3888 |
9 | 11230 |
10 | 31169 |
11 | 82234 |
12 | 208068 |
13 | 504148 |
14 | 1175882 |
15 | 2643952 |
16 | 5751108 |
17 | 12125574 |
18 | 24845786 |
19 | 49567350 |
20 | 96475743 |
21 | 183489050 |
22 | 341565932 |
23 | 623152106 |
24 | 1115673576 |
25 | 1962423333 |
26 | 3394902381 |
27 | 5781655379 |
[1,1,4,11,40,122,410,1270,3888,11230,31169,82234, 208068,504148,1175882,2643952,5751108,12125574, 24845786,49567350,96475743,183489050,341565932, 623152106,1115673576,1962423333,3394902381, 5781655379] |