n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 18 |
4 | 93 |
5 | 618 |
6 | 4905 |
7 | 45162 |
8 | 474777 |
9 | 5618322 |
10 | 73895085 |
11 | 1069104258 |
12 | 16873062453 |
13 | 288485314938 |
14 | 5311769483025 |
15 | 104789840677722 |
16 | 2205098925335217 |
17 | 49302142664941602 |
18 | 1167150946521879765 |
[1,2,5,18,93,618,4905,45162,474777,5618322, 73895085,1069104258,16873062453,288485314938, 5311769483025,104789840677722,2205098925335217, 49302142664941602,1167150946521879765] |