n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 22 |
3 | 80 |
4 | 294 |
5 | 1092 |
6 | 4092 |
7 | 15444 |
8 | 58630 |
9 | 223652 |
10 | 856596 |
11 | 3292016 |
12 | 12688732 |
13 | 49031400 |
14 | 189885240 |
15 | 736808220 |
16 | 2863971270 |
17 | 11149451940 |
18 | 43465121700 |
19 | 169657266240 |
20 | 662976162420 |
21 | 2593424304120 |
22 | 10154564564040 |
23 | 39794915183400 |
24 | 156078401826204 |
25 | 612605246582952 |
[1,6,22,80,294,1092,4092,15444,58630,223652, 856596,3292016,12688732,49031400,189885240, 736808220,2863971270,11149451940,43465121700, 169657266240,662976162420,2593424304120, 10154564564040,39794915183400,156078401826204, 612605246582952] |