| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 300 |
| 3 | 47040 |
| 4 | 14968800 |
| 5 | 7991343360 |
| 6 | 6422134118400 |
| 7 | 7240779786240000 |
| 8 | 10899907851216384000 |
| 9 | 21115899915689779200000 |
| 10 | 51167604130438090014720000 |
| 11 | 151615591667542267763097600000 |
| 12 | 539306547534817468755148800000000 |
| 13 | 2267795648217238975260881584128000000 |
[6,300,47040,14968800,7991343360,6422134118400, 7240779786240000,10899907851216384000, 21115899915689779200000, 51167604130438090014720000, 151615591667542267763097600000, 539306547534817468755148800000000, 2267795648217238975260881584128000000] |