n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 15 |
3 | 35 |
4 | 3780 |
5 | 9504 |
6 | 2702700 |
7 | 7001280 |
8 | 3809332800 |
9 | 10027987200 |
10 | 8896257216000 |
11 | 23655956688000 |
12 | 31072794873120000 |
13 | 83196255098880000 |
14 | 151687572109032960000 |
15 | 408177466766125056000 |
16 | 986280987631626086400000 |
17 | 2664118997179074699264000 |
[1,1,15,35,3780,9504,2702700,7001280,3809332800, 10027987200,8896257216000,23655956688000, 31072794873120000,83196255098880000, 151687572109032960000,408177466766125056000, 986280987631626086400000, 2664118997179074699264000] |