n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 4 |
6 | 11 |
7 | 32 |
8 | 95 |
9 | 284 |
10 | 860 |
11 | 2630 |
12 | 8115 |
13 | 25242 |
14 | 79080 |
15 | 249342 |
16 | 790719 |
17 | 2520546 |
18 | 8072216 |
19 | 25961150 |
20 | 83814536 |
21 | 271538192 |
22 | 882527618 |
23 | 2876712308 |
24 | 9402284815 |
25 | 30806948110 |
26 | 101172278362 |
27 | 332965892290 |
28 | 1097990333320 |
29 | 3627433618396 |
[1,1,1,1,4,11,32,95,284,860,2630,8115,25242,79080, 249342,790719,2520546,8072216,25961150,83814536, 271538192,882527618,2876712308,9402284815, 30806948110,101172278362,332965892290, 1097990333320,3627433618396] |