n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 100 |
6 | 408 |
7 | 1631 |
8 | 6440 |
9 | 25263 |
10 | 98790 |
11 | 385803 |
12 | 1506156 |
13 | 5881057 |
14 | 22974406 |
15 | 89804910 |
16 | 351279584 |
17 | 1375035208 |
18 | 5386203792 |
19 | 21113167346 |
20 | 82816267480 |
21 | 325055630634 |
22 | 1276635121388 |
23 | 5016837177052 |
24 | 19725798613152 |
25 | 77601159558800 |
[1,2,6,24,100,408,1631,6440,25263,98790,385803, 1506156,5881057,22974406,89804910,351279584, 1375035208,5386203792,21113167346,82816267480, 325055630634,1276635121388,5016837177052, 19725798613152,77601159558800] |