n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 10 |
3 | 40 |
4 | 150 |
5 | 624 |
6 | 2580 |
7 | 11160 |
8 | 48750 |
9 | 217000 |
10 | 976248 |
11 | 4438920 |
12 | 20343700 |
13 | 93900240 |
14 | 435959820 |
15 | 2034504992 |
16 | 9536718750 |
17 | 44878791360 |
18 | 211927516500 |
19 | 1003867701480 |
20 | 4768371093720 |
21 | 22706531339280 |
[1,5,10,40,150,624,2580,11160,48750,217000,976248, 4438920,20343700,93900240,435959820,2034504992, 9536718750,44878791360,211927516500,1003867701480, 4768371093720,22706531339280] |