n | a(n) |
---|---|
1 | 2 |
2 | 3 |
3 | 8 |
4 | 18 |
5 | 48 |
6 | 116 |
7 | 312 |
8 | 810 |
9 | 2184 |
10 | 5880 |
11 | 16104 |
12 | 44220 |
13 | 122640 |
14 | 341484 |
15 | 956576 |
16 | 2690010 |
17 | 7596480 |
18 | 21522228 |
19 | 61171656 |
20 | 174336264 |
21 | 498111952 |
22 | 1426403748 |
23 | 4093181688 |
24 | 11767874940 |
25 | 33891544368 |
26 | 97764009000 |
27 | 282429535752 |
28 | 817028131140 |
29 | 2366564736720 |
[2,3,8,18,48,116,312,810,2184,5880,16104,44220, 122640,341484,956576,2690010,7596480,21522228, 61171656,174336264,498111952,1426403748, 4093181688,11767874940,33891544368,97764009000, 282429535752,817028131140,2366564736720] |