n | a(n) |
---|---|
0 | 3 |
1 | 45 |
2 | 252 |
3 | 28350 |
4 | 1496880 |
5 | 3405402000 |
6 | 17513496000 |
7 | 7815397590000 |
8 | 5543722023840000 |
9 | 235212205868640000 |
10 | 206559082608278400000 |
11 | 516914104227216696000000 |
12 | 572581776990147724800000 |
[3,45,252,28350,1496880,3405402000,17513496000, 7815397590000,5543722023840000,235212205868640000, 206559082608278400000,516914104227216696000000, 572581776990147724800000] |