n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 15 |
6 | 30 |
7 | 70 |
8 | 210 |
9 | 462 |
10 | 6006 |
11 | 51051 |
12 | 102102 |
13 | 277134 |
14 | 6374082 |
15 | 10623470 |
16 | 223092870 |
17 | 588153930 |
18 | 18232771830 |
19 | 51893273670 |
20 | 2127624220470 |
21 | 5381637734130 |
22 | 252936973504110 |
23 | 6702829797858915 |
24 | 13405659595717830 |
25 | 41628100849860630 |
26 | 2539314151841498430 |
27 | 7397132529277408470 |
[1,1,2,6,15,30,70,210,462,6006,51051,102102, 277134,6374082,10623470,223092870,588153930, 18232771830,51893273670,2127624220470, 5381637734130,252936973504110,6702829797858915, 13405659595717830,41628100849860630, 2539314151841498430,7397132529277408470] |