n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 42 |
3 | 231 |
4 | 1260 |
5 | 6825 |
6 | 36960 |
7 | 200025 |
8 | 1082550 |
9 | 5858475 |
10 | 31704750 |
11 | 171577875 |
12 | 928536000 |
13 | 5024998125 |
14 | 27194002500 |
15 | 147166963125 |
16 | 796429856250 |
17 | 4310074059375 |
18 | 23325015131250 |
19 | 126228998109375 |
20 | 683118955312500 |
[1,7,42,231,1260,6825,36960,200025,1082550, 5858475,31704750,171577875,928536000,5024998125, 27194002500,147166963125,796429856250, 4310074059375,23325015131250,126228998109375, 683118955312500] |