n | a(n) |
---|---|
1 | 4 |
2 | 6 |
3 | 17 |
4 | 35 |
5 | 72 |
6 | 241 |
7 | 722 |
8 | 1821 |
9 | 4863 |
10 | 14841 |
11 | 43444 |
12 | 119306 |
13 | 335624 |
14 | 985356 |
15 | 2849009 |
16 | 8044468 |
17 | 22928355 |
18 | 66336411 |
19 | 190801483 |
20 | 543986757 |
21 | 1556622000 |
22 | 4478561650 |
23 | 12855871827 |
24 | 36783013974 |
25 | 105393294206 |
26 | 302583744944 |
27 | 867943015259 |
[4,6,17,35,72,241,722,1821,4863,14841,43444, 119306,335624,985356,2849009,8044468,22928355, 66336411,190801483,543986757,1556622000, 4478561650,12855871827,36783013974,105393294206, 302583744944,867943015259] |