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A294681
as a simple table
n
a(n)
1
1
2
2
3
7
4
26
5
28
6
31
7
38
8
47
9
59
10
226
11
233
12
656
13
752
14
1073
15
1808
16
3646
17
4252
18
5246
19
24686
20
37952
21
59599
[1,2,7,26,28,31,38,47,59,226,233,656,752,1073, 1808,3646,4252,5246,24686,37952,59599]