n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 18 |
4 | 111 |
5 | 800 |
6 | 5990 |
7 | 46995 |
8 | 379090 |
9 | 3129713 |
10 | 26301576 |
11 | 224282112 |
12 | 1935668344 |
13 | 16876028036 |
14 | 148410725830 |
15 | 1314933853171 |
16 | 11726585616205 |
17 | 105178923513494 |
18 | 948185788906100 |
19 | 8586757756571261 |
20 | 78079244607685021 |
21 | 712592590813142079 |
22 | 6525273550226573555 |
[1,1,3,18,111,800,5990,46995,379090,3129713, 26301576,224282112,1935668344,16876028036, 148410725830,1314933853171,11726585616205, 105178923513494,948185788906100,8586757756571261, 78079244607685021,712592590813142079, 6525273550226573555] |