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A192097
as a simple table
n
a(n)
0
1
1
1
2
2
3
4
4
8
5
8
6
16
7
28
8
40
9
80
10
144
11
252
12
456
13
840
[1,1,2,4,8,8,16,28,40,80,144,252,456,840]
