n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 26 |
4 | 168 |
5 | 1195 |
6 | 8988 |
7 | 70318 |
8 | 566388 |
9 | 4665221 |
10 | 39113732 |
11 | 332691758 |
12 | 2863778072 |
13 | 24900264326 |
14 | 218372530380 |
15 | 1929363592870 |
16 | 17157018725000 |
17 | 153442147343648 |
18 | 1379250344938676 |
19 | 12453816724761706 |
20 | 112907775890596400 |
21 | 1027394297869071687 |
[1,1,5,26,168,1195,8988,70318,566388,4665221, 39113732,332691758,2863778072,24900264326, 218372530380,1929363592870,17157018725000, 153442147343648,1379250344938676, 12453816724761706,112907775890596400, 1027394297869071687] |