n | a(n) |
---|---|
4 | 1 |
5 | 5 |
6 | 25 |
7 | 102 |
8 | 410 |
9 | 1545 |
10 | 5784 |
11 | 21015 |
12 | 76248 |
13 | 272377 |
14 | 974208 |
15 | 3455177 |
16 | 12287351 |
17 | 43502174 |
18 | 154554897 |
19 | 547955950 |
20 | 1950335934 |
21 | 6937352521 |
22 | 24777223885 |
23 | 88515560121 |
24 | 317513893877 |
25 | 1139848959317 |
26 | 4108296484542 |
27 | 14823490668322 |
28 | 53689879422115 |
29 | 194704264528116 |
[1,5,25,102,410,1545,5784,21015,76248,272377, 974208,3455177,12287351,43502174,154554897, 547955950,1950335934,6937352521,24777223885, 88515560121,317513893877,1139848959317, 4108296484542,14823490668322,53689879422115, 194704264528116] |