n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 2 |
3 | 6 |
4 | 10 |
5 | 210 |
6 | 22 |
7 | 30030 |
8 | 1870 |
9 | 149226 |
10 | 3910 |
11 | 6469693230 |
12 | 11594 |
13 | 7420738134810 |
14 | 3215630 |
15 | 741422598 |
16 | 2569288370 |
17 | 32589158477190044730 |
18 | 28045886 |
19 | 117288381359406970983270 |
20 | 19644868330 |
21 | 4812825965463978 |
22 | 23916676633630 |
23 | 3217644767340672907899084554130 |
[1,2,2,6,10,210,22,30030,1870,149226,3910, 6469693230,11594,7420738134810,3215630,741422598, 2569288370,32589158477190044730,28045886, 117288381359406970983270,19644868330, 4812825965463978,23916676633630, 3217644767340672907899084554130] |