n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 90 |
3 | 705600 |
4 | 4105057320000 |
5 | 52487876090562232320000 |
6 | 3487017405172854771910634342400000000 |
7 | 2448893405298238642974553493547144534294528000000000000 |
8 | 33257039167768610289435138215602132823918399655132218973388800000000000000000 |
[1,2,90,705600,4105057320000, 52487876090562232320000, 3487017405172854771910634342400000000, 24488934052982386429745534935471445342945280000000\ 00000, 33257039167768610289435138215602132823918399655132\ 218973388800000000000000000] |