n | a(n) |
---|---|
2 | 3 |
3 | 5 |
4 | 18 |
5 | 90 |
6 | 552 |
7 | 3960 |
8 | 32400 |
9 | 297360 |
10 | 3024000 |
11 | 33747840 |
12 | 410054400 |
13 | 5388768000 |
14 | 76161254400 |
15 | 1151998848000 |
16 | 18568976025600 |
17 | 317764871424000 |
18 | 5753767219200000 |
19 | 109907415281664000 |
20 | 2208818928476160000 |
21 | 46590073456582656000 |
22 | 1029117549458718720000 |
[3,5,18,90,552,3960,32400,297360,3024000,33747840, 410054400,5388768000,76161254400,1151998848000, 18568976025600,317764871424000,5753767219200000, 109907415281664000,2208818928476160000, 46590073456582656000,1029117549458718720000] |