n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 6 |
5 | 16 |
6 | 37 |
7 | 95 |
8 | 238 |
9 | 624 |
10 | 1650 |
11 | 4478 |
12 | 12356 |
13 | 34756 |
14 | 99313 |
15 | 288145 |
16 | 847366 |
17 | 2523092 |
18 | 7597834 |
19 | 23117382 |
20 | 71007196 |
[1,1,1,3,6,16,37,95,238,624,1650,4478,12356,34756, 99313,288145,847366,2523092,7597834,23117382, 71007196] |