n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 22 |
5 | 74 |
6 | 271 |
7 | 1012 |
8 | 3858 |
9 | 15046 |
10 | 59579 |
11 | 238825 |
12 | 967873 |
13 | 3958517 |
14 | 16316594 |
15 | 67716000 |
16 | 282719162 |
17 | 1186633647 |
18 | 5004102122 |
19 | 21192022233 |
20 | 90089538788 |
21 | 384305738731 |
22 | 1644544501988 |
23 | 7057705570877 |
24 | 30368821119351 |
25 | 130993073168419 |
26 | 566297366630412 |
27 | 2453269044761359 |
[1,1,2,7,22,74,271,1012,3858,15046,59579,238825, 967873,3958517,16316594,67716000,282719162, 1186633647,5004102122,21192022233,90089538788, 384305738731,1644544501988,7057705570877, 30368821119351,130993073168419,566297366630412, 2453269044761359] |