n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 3 |
3 | 6 |
4 | 21 |
5 | 90 |
6 | 495 |
7 | 3150 |
8 | 23625 |
9 | 198450 |
10 | 1885275 |
11 | 19646550 |
12 | 225935325 |
13 | 2809456650 |
14 | 37927664775 |
15 | 547844046750 |
16 | 8491582724625 |
17 | 139700231921250 |
18 | 2444754058621875 |
19 | 45123174910563750 |
20 | 879901910755993125 |
21 | 18004146789314936250 |
22 | 387089155970271129375 |
23 | 8696002899239114208750 |
[1,2,3,6,21,90,495,3150,23625,198450,1885275, 19646550,225935325,2809456650,37927664775, 547844046750,8491582724625,139700231921250, 2444754058621875,45123174910563750, 879901910755993125,18004146789314936250, 387089155970271129375,8696002899239114208750] |