n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 52 |
6 | 203 |
7 | 877 |
8 | 4140 |
9 | 20270 |
10 | 102004 |
11 | 523700 |
12 | 2726840 |
13 | 14332663 |
14 | 75789343 |
15 | 402290332 |
16 | 2140945657 |
17 | 11413941169 |
18 | 60921661218 |
19 | 325417158033 |
20 | 1739114057259 |
21 | 9297387238139 |
22 | 49715367098205 |
23 | 265879355474309 |
24 | 1422070344597675 |
25 | 7606514013820659 |
[1,1,2,5,15,52,203,877,4140,20270,102004,523700, 2726840,14332663,75789343,402290332,2140945657, 11413941169,60921661218,325417158033, 1739114057259,9297387238139,49715367098205, 265879355474309,1422070344597675,7606514013820659] |