n | a(n) |
---|---|
1 | 2 |
2 | 17 |
3 | 122 |
4 | 720 |
5 | 4304 |
6 | 25391 |
7 | 150079 |
8 | 884793 |
9 | 5205467 |
10 | 30603312 |
11 | 179828144 |
12 | 1056663902 |
13 | 6208358851 |
14 | 36476199327 |
15 | 214305557200 |
16 | 1259086948475 |
17 | 7397361356851 |
18 | 43460791661461 |
19 | 255339657788151 |
20 | 1500164308002762 |
[2,17,122,720,4304,25391,150079,884793,5205467, 30603312,179828144,1056663902,6208358851, 36476199327,214305557200,1259086948475, 7397361356851,43460791661461,255339657788151, 1500164308002762] |