n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 8 |
4 | 22 |
5 | 64 |
6 | 196 |
7 | 625 |
8 | 2055 |
9 | 6917 |
10 | 23713 |
11 | 82499 |
12 | 290511 |
13 | 1033411 |
14 | 3707851 |
15 | 13402696 |
16 | 48760366 |
17 | 178405156 |
18 | 656043856 |
19 | 2423307046 |
20 | 8987427466 |
21 | 33453694486 |
22 | 124936258126 |
23 | 467995871776 |
24 | 1757900019100 |
[0,1,3,8,22,64,196,625,2055,6917,23713,82499, 290511,1033411,3707851,13402696,48760366, 178405156,656043856,2423307046,8987427466, 33453694486,124936258126,467995871776, 1757900019100] |