n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 11 |
5 | 35 |
6 | 128 |
7 | 523 |
8 | 2329 |
9 | 11206 |
10 | 57685 |
11 | 315515 |
12 | 1824216 |
13 | 11097706 |
14 | 70771858 |
15 | 471589169 |
16 | 3274334755 |
17 | 23630689143 |
18 | 176882416706 |
19 | 1370600471230 |
20 | 10975020795140 |
21 | 90675899684369 |
22 | 771893276793888 |
23 | 6761498234340104 |
24 | 60874834962590159 |
25 | 562694002401250455 |
[1,1,2,4,11,35,128,523,2329,11206,57685,315515, 1824216,11097706,70771858,471589169,3274334755, 23630689143,176882416706,1370600471230, 10975020795140,90675899684369,771893276793888, 6761498234340104,60874834962590159, 562694002401250455] |