n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 5 |
6 | 13 |
7 | 35 |
8 | 100 |
9 | 300 |
10 | 925 |
11 | 2915 |
12 | 9386 |
13 | 30771 |
14 | 102347 |
15 | 344705 |
16 | 1173960 |
17 | 4037381 |
18 | 14004912 |
19 | 48954659 |
20 | 172307930 |
21 | 610269695 |
22 | 2173656683 |
23 | 7782070631 |
24 | 27992709172 |
25 | 101128485150 |
26 | 366803656323 |
27 | 1335349400274 |
28 | 4877991428982 |
[1,1,1,2,5,13,35,100,300,925,2915,9386,30771, 102347,344705,1173960,4037381,14004912,48954659, 172307930,610269695,2173656683,7782070631, 27992709172,101128485150,366803656323, 1335349400274,4877991428982] |