n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 12 |
3 | 28 |
4 | 84 |
5 | 212 |
6 | 632 |
7 | 1544 |
8 | 4584 |
9 | 11220 |
10 | 33060 |
11 | 80152 |
12 | 234648 |
13 | 565192 |
14 | 1643552 |
15 | 3926832 |
16 | 11337422 |
17 | 26852656 |
18 | 76981660 |
[1,4,12,28,84,212,632,1544,4584,11220,33060,80152, 234648,565192,1643552,3926832,11337422,26852656, 76981660] |