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A120708
as a simple table
n
a(n)
0
1
1
1
2
2
3
3
4
8
5
24
6
30
7
60
8
262
9
262
10
950
11
2508
12
4964
[1,1,2,3,8,24,30,60,262,262,950,2508,4964]