n | a(n) |
---|---|
1 | 2 |
2 | 6 |
3 | 15 |
4 | 105 |
5 | 385 |
6 | 1001 |
7 | 17017 |
8 | 323323 |
9 | 7436429 |
10 | 19605131 |
11 | 86822723 |
12 | 3212440751 |
13 | 131710070791 |
14 | 5663533044013 |
15 | 266186053068611 |
16 | 613385252723321 |
17 | 2783825377744303 |
18 | 5855632691117327 |
19 | 392327390304860909 |
20 | 27855244711645124539 |
21 | 2033432863950094091347 |
22 | 160641196252057433216413 |
[2,6,15,105,385,1001,17017,323323,7436429, 19605131,86822723,3212440751,131710070791, 5663533044013,266186053068611,613385252723321, 2783825377744303,5855632691117327, 392327390304860909,27855244711645124539, 2033432863950094091347,160641196252057433216413] |