n | a(n) |
---|---|
0 | 1 |
1 | 19 |
2 | 55 |
3 | 127 |
4 | 339 |
5 | 899 |
6 | 2455 |
7 | 6767 |
8 | 18859 |
9 | 52939 |
10 | 149535 |
11 | 424487 |
12 | 1210059 |
13 | 3461659 |
14 | 9933055 |
15 | 28577687 |
16 | 82409179 |
17 | 238128539 |
18 | 689345935 |
19 | 1998806327 |
20 | 5804195179 |
21 | 16876837979 |
22 | 49132180735 |
23 | 143192973047 |
24 | 417751959379 |
[1,19,55,127,339,899,2455,6767,18859,52939,149535, 424487,1210059,3461659,9933055,28577687,82409179, 238128539,689345935,1998806327,5804195179, 16876837979,49132180735,143192973047,417751959379] |