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A294727
as a simple table
n
a(n)
1
2
2
3
3
5
4
7
5
13
6
79
7
98
8
273
9
1173
10
3008
11
3118
12
4352
13
4748
14
5648
15
11167
16
11750
17
12555
18
26613
19
88303
[2,3,5,7,13,79,98,273,1173,3008,3118,4352,4748, 5648,11167,11750,12555,26613,88303]