n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 14 |
5 | 41 |
6 | 137 |
7 | 459 |
8 | 1653 |
9 | 6053 |
10 | 22929 |
11 | 88744 |
12 | 350239 |
13 | 1405126 |
14 | 5726560 |
15 | 23602997 |
16 | 98536165 |
17 | 415093134 |
18 | 1765463633 |
19 | 7569222711 |
20 | 32689073839 |
21 | 142148086350 |
22 | 621856360143 |
23 | 2735876852080 |
24 | 12099489262898 |
25 | 53762825236136 |
26 | 239965710327795 |
27 | 1075431184473066 |
28 | 4838203611554393 |
[1,1,2,5,14,41,137,459,1653,6053,22929,88744, 350239,1405126,5726560,23602997,98536165, 415093134,1765463633,7569222711,32689073839, 142148086350,621856360143,2735876852080, 12099489262898,53762825236136,239965710327795, 1075431184473066,4838203611554393] |