n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 7 |
4 | 31 |
5 | 114 |
6 | 385 |
7 | 1250 |
8 | 3987 |
9 | 12619 |
10 | 39810 |
11 | 125425 |
12 | 394955 |
13 | 1243433 |
14 | 3914383 |
15 | 12322293 |
16 | 38789576 |
17 | 122105944 |
18 | 384377494 |
19 | 1209981891 |
20 | 3808901216 |
21 | 11990036895 |
22 | 37743426054 |
23 | 118812495000 |
24 | 374009739009 |
25 | 1177344897390 |
26 | 3706162867858 |
27 | 11666626518622 |
28 | 36725362368682 |
29 | 115607732787126 |
30 | 363921470561515 |
[0,1,7,31,114,385,1250,3987,12619,39810,125425, 394955,1243433,3914383,12322293,38789576, 122105944,384377494,1209981891,3808901216, 11990036895,37743426054,118812495000,374009739009, 1177344897390,3706162867858,11666626518622, 36725362368682,115607732787126,363921470561515] |