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A147211 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 57
12 57
13 405
14 405
15 4805
16 4805
17 131407
18 131407
19 3796773
20 3796773
21 159419173
22 159419173

[1,1,1,1,1,1,1,1,17,17,57,57,405,405,4805,4805,
 131407,131407,3796773,3796773,159419173,159419173]

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Last modified September 26 11:42 EDT 2022. Contains 356997 sequences. (Running on oeis4.)