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A241080
as a simple table
n
a(n)
1
3
2
8
3
18
4
36
5
72
6
420
7
720
8
840
9
1260
10
3360
11
7560
12
20160
13
554400
14
2882880
15
4324320
16
36756720
17
6983776800
[3,8,18,36,72,420,720,840,1260,3360,7560,20160, 554400,2882880,4324320,36756720,6983776800]