n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 15 |
4 | 47 |
5 | 157 |
6 | 549 |
7 | 1982 |
8 | 7354 |
9 | 27927 |
10 | 107979 |
11 | 424329 |
12 | 1690034 |
13 | 6812041 |
14 | 27739662 |
15 | 114012290 |
16 | 472388018 |
17 | 1971765577 |
18 | 8284065362 |
19 | 35014751268 |
20 | 148798722863 |
21 | 635518054040 |
22 | 2726620459966 |
23 | 11748054498309 |
24 | 50814320078733 |
25 | 220590909294021 |
26 | 960812893101569 |
27 | 4198183258800311 |
[1,2,5,15,47,157,549,1982,7354,27927,107979, 424329,1690034,6812041,27739662,114012290, 472388018,1971765577,8284065362,35014751268, 148798722863,635518054040,2726620459966, 11748054498309,50814320078733,220590909294021, 960812893101569,4198183258800311] |