n | a(n) |
---|---|
1 | 4 |
2 | 4 |
3 | 6 |
4 | 72 |
5 | 240 |
6 | 12240 |
7 | 35280 |
8 | 241920 |
9 | 1088640 |
10 | 50803200 |
11 | 1157587200 |
12 | 14370048000 |
13 | 298896998400 |
14 | 2353813862400 |
15 | 11769069312000 |
16 | 502146957312000 |
17 | 4268249137152000 |
18 | 621030249455616000 |
19 | 9488317831888896000 |
[4,4,6,72,240,12240,35280,241920,1088640,50803200, 1157587200,14370048000,298896998400,2353813862400, 11769069312000,502146957312000,4268249137152000, 621030249455616000,9488317831888896000] |