n | a(n) |
---|---|
0 | 2 |
1 | 4 |
2 | 10 |
3 | 32 |
4 | 114 |
5 | 420 |
6 | 1562 |
7 | 5824 |
8 | 21730 |
9 | 81092 |
10 | 302634 |
11 | 1129440 |
12 | 4215122 |
13 | 15731044 |
14 | 58709050 |
15 | 219105152 |
16 | 817711554 |
17 | 3051741060 |
18 | 11389252682 |
19 | 42505269664 |
20 | 158631825970 |
21 | 592022034212 |
22 | 2209456310874 |
23 | 8245803209280 |
24 | 30773756526242 |
25 | 114849222895684 |
[2,4,10,32,114,420,1562,5824,21730,81092,302634, 1129440,4215122,15731044,58709050,219105152, 817711554,3051741060,11389252682,42505269664, 158631825970,592022034212,2209456310874, 8245803209280,30773756526242,114849222895684] |