The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 264 |
| 3 | 45408 |
| 4 | 10177920 |
| 5 | 9310826880 |
| 6 | 27806077440 |
| 7 | 25437179036160 |
| 8 | 303753589954560 |
| 9 | 277875743791011840 |
| 10 | 14504815632384 |
| 11 | 13269098919960576 |
| 12 | 2534919599177957376 |
| 13 | 2318960803647990104064 |
[6,264,45408,10177920,9310826880,27806077440, 25437179036160,303753589954560,277875743791011840, 14504815632384,13269098919960576, 2534919599177957376,2318960803647990104064] |