n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 15 |
3 | 35 |
4 | 315 |
5 | 693 |
6 | 3003 |
7 | 6435 |
8 | 109395 |
9 | 230945 |
10 | 969969 |
11 | 2028117 |
12 | 16900975 |
13 | 35102025 |
14 | 145422675 |
15 | 300540195 |
16 | 9917826435 |
17 | 20419054425 |
18 | 83945001525 |
19 | 172308161025 |
20 | 1412926920405 |
21 | 2893136075115 |
22 | 11835556670925 |
[1,3,15,35,315,693,3003,6435,109395,230945,969969, 2028117,16900975,35102025,145422675,300540195, 9917826435,20419054425,83945001525,172308161025, 1412926920405,2893136075115,11835556670925] |