n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 30 |
3 | 115 |
4 | 425 |
5 | 1396 |
6 | 4440 |
7 | 13470 |
8 | 40000 |
9 | 116140 |
10 | 332827 |
11 | 942435 |
12 | 2647450 |
13 | 7386925 |
14 | 20511620 |
15 | 56731383 |
16 | 156451985 |
17 | 430462915 |
18 | 1182341890 |
19 | 3243215495 |
20 | 8887664047 |
21 | 24338341165 |
22 | 66616422775 |
23 | 182276901760 |
24 | 498657609720 |
25 | 1364083988834 |
[1,5,30,115,425,1396,4440,13470,40000,116140, 332827,942435,2647450,7386925,20511620,56731383, 156451985,430462915,1182341890,3243215495, 8887664047,24338341165,66616422775,182276901760, 498657609720,1364083988834] |