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A146660 as a simple table

n a(n)
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 1
9 17
10 17
11 73
12 73
13 521
14 521
15 7411
16 7411
17 207693
18 207693
19 7583663
20 7583663
21 399906057
22 399906057

[1,1,1,1,1,1,1,1,17,17,73,73,521,521,7411,7411,
 207693,207693,7583663,7583663,399906057,399906057]

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Last modified August 12 23:52 EDT 2022. Contains 356077 sequences. (Running on oeis4.)