The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | 4 |
| 2 | 14 |
| 3 | 1120 |
| 4 | 1129856000 |
| 5 | 1429646991180169216000000000 |
| 6 | 2922003679260403682236915960536301659966658013592289280000000000000000000000000000 |
[3,4,14,1120,1129856000, 1429646991180169216000000000, 29220036792604036822369159605363016599666580135922\ 89280000000000000000000000000000] |