n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 9 |
4 | 49 |
5 | 310 |
6 | 2521 |
7 | 25557 |
8 | 290550 |
9 | 3555041 |
10 | 48104901 |
11 | 741103946 |
12 | 12825399313 |
13 | 240202011881 |
14 | 4747281446090 |
15 | 98808864563065 |
16 | 2194031697420057 |
17 | 52582450760730398 |
18 | 1357237338948268649 |
[1,1,2,9,49,310,2521,25557,290550,3555041, 48104901,741103946,12825399313,240202011881, 4747281446090,98808864563065,2194031697420057, 52582450760730398,1357237338948268649] |