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A077134
as a simple table
n
a(n)
0
1
1
1
2
1
3
3
4
12
5
60
6
360
7
2520
8
20160
9
181440
10
1814400
11
19958400
12
239500800
[1,1,1,3,12,60,360,2520,20160,181440,1814400, 19958400,239500800]