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A006596
as a simple table
n
a(n)
1
2
2
5
3
6
4
14
5
21
6
26
7
141
8
278
9
281
10
306
11
345
12
1365
13
2573
14
2661
15
4766
16
5385
[2,5,6,14,21,26,141,278,281,306,345,1365,2573, 2661,4766,5385]