n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 2 |
6 | 5 |
7 | 15 |
8 | 53 |
9 | 222 |
10 | 1115 |
11 | 6698 |
12 | 47243 |
13 | 382187 |
14 | 3480048 |
15 | 35251942 |
16 | 394839407 |
17 | 4875966656 |
18 | 66282636371 |
19 | 989985346269 |
20 | 16198580140543 |
21 | 289168351452220 |
22 | 5604120791540468 |
23 | 117309414122840454 |
24 | 2639927837211705159 |
25 | 63618153549702851338 |
[1,1,1,1,1,2,5,15,53,222,1115,6698,47243,382187, 3480048,35251942,394839407,4875966656,66282636371, 989985346269,16198580140543,289168351452220, 5604120791540468,117309414122840454, 2639927837211705159,63618153549702851338] |