n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 7 |
4 | 21 |
5 | 61 |
6 | 179 |
7 | 535 |
8 | 1597 |
9 | 4781 |
10 | 14331 |
11 | 42967 |
12 | 128869 |
13 | 386557 |
14 | 1159587 |
15 | 3478647 |
16 | 10435757 |
17 | 31306989 |
18 | 93920555 |
19 | 281761015 |
20 | 845282069 |
21 | 2535844733 |
22 | 7607531923 |
23 | 22822592343 |
24 | 68467771805 |
25 | 205403307437 |
26 | 616209910235 |
27 | 1848629712279 |
28 | 5545889108805 |
[0,1,3,7,21,61,179,535,1597,4781,14331,42967, 128869,386557,1159587,3478647,10435757,31306989, 93920555,281761015,845282069,2535844733, 7607531923,22822592343,68467771805,205403307437, 616209910235,1848629712279,5545889108805] |