n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 13 |
4 | 53 |
5 | 228 |
6 | 1037 |
7 | 4885 |
8 | 23640 |
9 | 116793 |
10 | 586633 |
11 | 2986616 |
12 | 15377097 |
13 | 79927913 |
14 | 418852716 |
15 | 2210503285 |
16 | 11738292397 |
17 | 62673984492 |
18 | 336260313765 |
19 | 1811960161517 |
20 | 9802082905840 |
21 | 53213718977777 |
22 | 289817858570513 |
23 | 1583076422786096 |
24 | 8670574105626961 |
[1,1,4,13,53,228,1037,4885,23640,116793,586633, 2986616,15377097,79927913,418852716,2210503285, 11738292397,62673984492,336260313765, 1811960161517,9802082905840,53213718977777, 289817858570513,1583076422786096,8670574105626961] |