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A007177
as a simple table
n
a(n)
1
2
2
4
3
10
4
31
5
43
6
121
7
424
8
853
9
1966
10
45961
11
56479
12
595612
[2,4,10,31,43,121,424,853,1966,45961,56479,595612]
