n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 28 |
4 | 90 |
5 | 311 |
6 | 1099 |
7 | 3928 |
8 | 14151 |
9 | 52025 |
10 | 193192 |
11 | 721507 |
12 | 2704857 |
13 | 10219356 |
14 | 38814183 |
15 | 147936398 |
16 | 565229232 |
17 | 2167575626 |
18 | 8337587694 |
19 | 32144302453 |
20 | 124143606307 |
21 | 480449680735 |
22 | 1862906012700 |
23 | 7234641087486 |
24 | 28131953989641 |
[1,3,9,28,90,311,1099,3928,14151,52025,193192, 721507,2704857,10219356,38814183,147936398, 565229232,2167575626,8337587694,32144302453, 124143606307,480449680735,1862906012700, 7234641087486,28131953989641] |