n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 15 |
4 | 51 |
5 | 199 |
6 | 755 |
7 | 2789 |
8 | 11425 |
9 | 45069 |
10 | 177057 |
11 | 733665 |
12 | 2980725 |
13 | 12049305 |
14 | 50487645 |
15 | 208617687 |
16 | 859190427 |
17 | 3628046575 |
18 | 15169356395 |
19 | 63268216427 |
20 | 268773317191 |
21 | 1133439243987 |
22 | 4770967084671 |
23 | 20364775412183 |
24 | 86442208982083 |
25 | 366403832827615 |
26 | 1570083042392987 |
27 | 6698851895314623 |
[1,1,5,15,51,199,755,2789,11425,45069,177057, 733665,2980725,12049305,50487645,208617687, 859190427,3628046575,15169356395,63268216427, 268773317191,1133439243987,4770967084671, 20364775412183,86442208982083,366403832827615, 1570083042392987,6698851895314623] |