n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 47 |
6 | 153 |
7 | 514 |
8 | 1769 |
9 | 6205 |
10 | 22102 |
11 | 79733 |
12 | 290721 |
13 | 1069688 |
14 | 3966739 |
15 | 14810348 |
16 | 55627778 |
17 | 210046102 |
18 | 796864028 |
19 | 3035912900 |
20 | 11610468138 |
21 | 44556451207 |
22 | 171529074168 |
23 | 662238211929 |
24 | 2563524741603 |
25 | 9947573055828 |
26 | 38687704042595 |
[1,1,2,5,15,47,153,514,1769,6205,22102,79733, 290721,1069688,3966739,14810348,55627778, 210046102,796864028,3035912900,11610468138, 44556451207,171529074168,662238211929, 2563524741603,9947573055828,38687704042595] |