n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 6 |
4 | 16 |
5 | 34 |
6 | 90 |
7 | 211 |
8 | 558 |
9 | 1430 |
10 | 3908 |
11 | 10725 |
12 | 30825 |
13 | 90156 |
14 | 273234 |
15 | 848355 |
16 | 2714399 |
17 | 8909057 |
18 | 30042866 |
19 | 103859678 |
20 | 368075596 |
21 | 1335537312 |
22 | 4958599228 |
23 | 18820993913 |
24 | 72980867400 |
25 | 288885080660 |
26 | 1166541823566 |
27 | 4802259167367 |
28 | 20141650236664 |
[1,3,6,16,34,90,211,558,1430,3908,10725,30825, 90156,273234,848355,2714399,8909057,30042866, 103859678,368075596,1335537312,4958599228, 18820993913,72980867400,288885080660, 1166541823566,4802259167367,20141650236664] |