n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 14 |
5 | 69 |
6 | 400 |
7 | 2714 |
8 | 21115 |
9 | 185345 |
10 | 1812263 |
11 | 19532170 |
12 | 230045568 |
13 | 2939471157 |
14 | 40499380396 |
15 | 598490843642 |
16 | 9442855533026 |
17 | 158430131720783 |
18 | 2816535675036146 |
19 | 52888281009012092 |
20 | 1046012668844905826 |
[1,0,1,3,14,69,400,2714,21115,185345,1812263, 19532170,230045568,2939471157,40499380396, 598490843642,9442855533026,158430131720783, 2816535675036146,52888281009012092, 1046012668844905826] |