n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 2 |
4 | 8 |
5 | 48 |
6 | 328 |
7 | 2335 |
8 | 17133 |
9 | 128262 |
10 | 975547 |
11 | 7518282 |
12 | 58582564 |
13 | 460769228 |
14 | 3653385453 |
15 | 29170737927 |
16 | 234350263419 |
17 | 1892956305974 |
18 | 15364355580327 |
19 | 125247311808502 |
20 | 1024983176867450 |
21 | 8417817643684208 |
22 | 69355110426227296 |
[0,1,2,8,48,328,2335,17133,128262,975547,7518282, 58582564,460769228,3653385453,29170737927, 234350263419,1892956305974,15364355580327, 125247311808502,1024983176867450,8417817643684208, 69355110426227296] |