n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 63 |
3 | 231 |
4 | 3003 |
5 | 9009 |
6 | 51051 |
7 | 138567 |
8 | 2909907 |
9 | 7436429 |
10 | 37182145 |
11 | 91265265 |
12 | 882230895 |
13 | 2103781365 |
14 | 9917826435 |
15 | 23141595015 |
16 | 856239015555 |
17 | 1964313035685 |
18 | 8948537162565 |
19 | 20251952525805 |
20 | 182267572732245 |
[1,7,63,231,3003,9009,51051,138567,2909907, 7436429,37182145,91265265,882230895,2103781365, 9917826435,23141595015,856239015555,1964313035685, 8948537162565,20251952525805,182267572732245] |