n | a(n) |
---|---|
1 | 5 |
2 | 20 |
3 | 130 |
4 | 1020 |
5 | 8855 |
6 | 81900 |
7 | 791120 |
8 | 7887660 |
9 | 80560285 |
10 | 838553320 |
11 | 8863227100 |
12 | 94871786100 |
13 | 1026317094705 |
14 | 11203116342560 |
15 | 123243929011680 |
16 | 1364973221797900 |
17 | 15207477517956825 |
18 | 170321264840835900 |
19 | 1916512328325665070 |
20 | 21655893753689280120 |
[5,20,130,1020,8855,81900,791120,7887660,80560285, 838553320,8863227100,94871786100,1026317094705, 11203116342560,123243929011680,1364973221797900, 15207477517956825,170321264840835900, 1916512328325665070,21655893753689280120] |