n | a(n) |
---|---|
0 | 0 |
1 | 5 |
2 | 30 |
3 | 135 |
4 | 660 |
5 | 3145 |
6 | 15810 |
7 | 78155 |
8 | 391320 |
9 | 1953405 |
10 | 9768870 |
11 | 48828175 |
12 | 244157820 |
13 | 1220703185 |
14 | 6103593930 |
15 | 30517584915 |
16 | 152588282640 |
17 | 762939453205 |
18 | 3814699250430 |
19 | 19073486328215 |
20 | 95367441415140 |
21 | 476837158360185 |
22 | 2384185839844050 |
[0,5,30,135,660,3145,15810,78155,391320,1953405, 9768870,48828175,244157820,1220703185,6103593930, 30517584915,152588282640,762939453205, 3814699250430,19073486328215,95367441415140, 476837158360185,2384185839844050] |