n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 20 |
3 | 75 |
4 | 275 |
5 | 1001 |
6 | 3639 |
7 | 13243 |
8 | 48280 |
9 | 176341 |
10 | 645150 |
11 | 2363596 |
12 | 8669142 |
13 | 31825005 |
14 | 116914020 |
15 | 429737220 |
16 | 1580244061 |
17 | 5812839156 |
18 | 21387636101 |
19 | 78708626396 |
20 | 289699273501 |
21 | 1066406842677 |
22 | 3925882147566 |
23 | 14453780545834 |
24 | 53216783798234 |
25 | 195944670698910 |
[1,5,20,75,275,1001,3639,13243,48280,176341, 645150,2363596,8669142,31825005,116914020, 429737220,1580244061,5812839156,21387636101, 78708626396,289699273501,1066406842677, 3925882147566,14453780545834,53216783798234, 195944670698910] |