n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 9 |
5 | 23 |
6 | 63 |
7 | 177 |
8 | 514 |
9 | 1526 |
10 | 4624 |
11 | 14230 |
12 | 44357 |
13 | 139779 |
14 | 444557 |
15 | 1425151 |
16 | 4600338 |
17 | 14939849 |
18 | 48778197 |
19 | 160019884 |
20 | 527200711 |
21 | 1743607825 |
22 | 5786756469 |
23 | 19266336882 |
24 | 64331275266 |
25 | 215377539119 |
26 | 722840378041 |
27 | 2431459847363 |
[1,1,2,4,9,23,63,177,514,1526,4624,14230,44357, 139779,444557,1425151,4600338,14939849,48778197, 160019884,527200711,1743607825,5786756469, 19266336882,64331275266,215377539119,722840378041, 2431459847363] |