n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 12 |
3 | 32 |
4 | 110 |
5 | 310 |
6 | 920 |
7 | 2558 |
8 | 7177 |
9 | 19660 |
10 | 53864 |
11 | 146180 |
12 | 396296 |
13 | 1070296 |
14 | 2888662 |
15 | 7785856 |
16 | 20982905 |
17 | 56536762 |
18 | 152378548 |
19 | 410825678 |
20 | 1108224556 |
21 | 2991244712 |
22 | 8079252116 |
23 | 21837144430 |
24 | 59066580606 |
25 | 159886668880 |
26 | 433122375508 |
[1,2,12,32,110,310,920,2558,7177,19660,53864, 146180,396296,1070296,2888662,7785856,20982905, 56536762,152378548,410825678,1108224556, 2991244712,8079252116,21837144430,59066580606, 159886668880,433122375508] |