n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 1 |
7 | 1 |
8 | 1 |
9 | 1 |
10 | 9 |
11 | 54 |
12 | 219 |
13 | 714 |
14 | 2001 |
15 | 5004 |
16 | 11439 |
17 | 24309 |
18 | 48619 |
19 | 831384 |
20 | 9069651 |
21 | 64369341 |
22 | 355150566 |
23 | 1635163542 |
24 | 6542615421 |
25 | 23369110326 |
26 | 75953123676 |
27 | 227864057851 |
28 | 5742168041637 |
29 | 90830731860000 |
30 | 920922875075934 |
31 | 7159714782188364 |
[1,1,1,1,1,1,1,1,1,1,9,54,219,714,2001,5004,11439, 24309,48619,831384,9069651,64369341,355150566, 1635163542,6542615421,23369110326,75953123676, 227864057851,5742168041637,90830731860000, 920922875075934,7159714782188364] |