n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 13 |
5 | 37 |
6 | 111 |
7 | 345 |
8 | 1103 |
9 | 3604 |
10 | 11977 |
11 | 40356 |
12 | 137543 |
13 | 473317 |
14 | 1642258 |
15 | 5738828 |
16 | 20179338 |
17 | 71346433 |
18 | 253485527 |
19 | 904536366 |
20 | 3240418665 |
21 | 11649734335 |
22 | 42017535527 |
23 | 151992797355 |
24 | 551298507620 |
25 | 2004602732825 |
26 | 7305747551718 |
27 | 26682235709115 |
[1,1,2,5,13,37,111,345,1103,3604,11977,40356, 137543,473317,1642258,5738828,20179338,71346433, 253485527,904536366,3240418665,11649734335, 42017535527,151992797355,551298507620, 2004602732825,7305747551718,26682235709115] |