n | a(n) |
---|---|
1 | 1 |
2 | 18 |
3 | 660 |
4 | 42000 |
5 | 4142880 |
6 | 586776960 |
7 | 113020427520 |
8 | 28432576972800 |
9 | 9056055981772800 |
10 | 3562946373482496000 |
11 | 1697172166720622592000 |
12 | 962691052768668647424000 |
13 | 641260394342965606809600000 |
14 | 495681727573700350908825600000 |
15 | 440084864982859007245221888000000 |
[1,18,660,42000,4142880,586776960,113020427520, 28432576972800,9056055981772800, 3562946373482496000,1697172166720622592000, 962691052768668647424000, 641260394342965606809600000, 495681727573700350908825600000, 440084864982859007245221888000000] |