n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 22 |
4 | 98 |
5 | 516 |
6 | 3172 |
7 | 22436 |
8 | 180252 |
9 | 1624888 |
10 | 16258376 |
11 | 178877832 |
12 | 2146674136 |
13 | 27907332272 |
14 | 390705042288 |
15 | 5860585983856 |
16 | 93769421948432 |
17 | 1594080384922656 |
18 | 28693447925921632 |
[1,2,6,22,98,516,3172,22436,180252,1624888, 16258376,178877832,2146674136,27907332272, 390705042288,5860585983856,93769421948432, 1594080384922656,28693447925921632] |