n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 15 |
4 | 135 |
5 | 1485 |
6 | 22275 |
7 | 467775 |
8 | 10758825 |
9 | 312005925 |
10 | 10296195525 |
11 | 360366843375 |
12 | 14054306891625 |
13 | 576226582556625 |
14 | 29387555710387875 |
15 | 1557540452650557375 |
16 | 98125048516985114625 |
17 | 6378128153604032450625 |
18 | 440090842598678239093125 |
[1,1,3,15,135,1485,22275,467775,10758825, 312005925,10296195525,360366843375,14054306891625, 576226582556625,29387555710387875, 1557540452650557375,98125048516985114625, 6378128153604032450625,440090842598678239093125] |