n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 118 |
6 | 714 |
7 | 5012 |
8 | 40164 |
9 | 361872 |
10 | 3621366 |
11 | 39854930 |
12 | 478427452 |
13 | 6221137644 |
14 | 87112280208 |
15 | 1306869108686 |
16 | 20912175669082 |
17 | 355537064658852 |
18 | 6400095163337508 |
19 | 121608318630457872 |
20 | 2432271817858395382 |
21 | 51079520016325649394 |
22 | 1123782363517325646716 |
[1,1,2,6,24,118,714,5012,40164,361872,3621366, 39854930,478427452,6221137644,87112280208, 1306869108686,20912175669082,355537064658852, 6400095163337508,121608318630457872, 2432271817858395382,51079520016325649394, 1123782363517325646716] |