n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 26 |
5 | 150 |
6 | 1066 |
7 | 8862 |
8 | 83506 |
9 | 874302 |
10 | 10035538 |
11 | 125082870 |
12 | 1680770250 |
13 | 24211249062 |
14 | 372151797498 |
15 | 6080329604238 |
16 | 105238649649762 |
17 | 1923853815102030 |
18 | 37047429233963170 |
19 | 749689860387252966 |
[1,1,2,6,26,150,1066,8862,83506,874302,10035538, 125082870,1680770250,24211249062,372151797498, 6080329604238,105238649649762,1923853815102030, 37047429233963170,749689860387252966] |