n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 24 |
6 | 66 |
7 | 176 |
8 | 493 |
9 | 1362 |
10 | 3821 |
11 | 10660 |
12 | 29864 |
13 | 83329 |
14 | 232702 |
15 | 648182 |
16 | 1804901 |
17 | 5015725 |
18 | 13931755 |
19 | 38635673 |
20 | 107090666 |
21 | 296449133 |
22 | 820271143 |
23 | 2267225157 |
24 | 6264244414 |
25 | 17291930470 |
[1,1,2,4,10,24,66,176,493,1362,3821,10660,29864, 83329,232702,648182,1804901,5015725,13931755, 38635673,107090666,296449133,820271143,2267225157, 6264244414,17291930470] |