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A064794
as a simple table
n
a(n)
1
1
2
2
3
3
4
8
5
40
6
64
7
121
8
149
9
359
10
2879
11
5563
12
28571
13
251677
[1,2,3,8,40,64,121,149,359,2879,5563,28571,251677]