n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 9 |
3 | 58 |
4 | 458 |
5 | 4120 |
6 | 40569 |
7 | 426842 |
8 | 4723890 |
9 | 54402904 |
10 | 646992474 |
11 | 7900772120 |
12 | 98642862232 |
13 | 1254984808672 |
14 | 16227116787737 |
15 | 212790354730842 |
16 | 2824992774357362 |
17 | 37915366854924952 |
18 | 513837166842215970 |
[1,2,9,58,458,4120,40569,426842,4723890,54402904, 646992474,7900772120,98642862232,1254984808672, 16227116787737,212790354730842,2824992774357362, 37915366854924952,513837166842215970] |