n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 30 |
4 | 242880 |
5 | 23565900177211392000 |
6 | 2773739201349556936377871973938118055565107020522751759201737480601600000000000000 |
[1,1,2,30,242880,23565900177211392000, 27737392013495569363778719739381180555651070205227\ 51759201737480601600000000000000] |