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A146407 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 53
12 53
13 413
14 413
15 6475
16 6475
17 139711
18 139711
19 4765521
20 4765521
21 251545591
22 251545591
23 21612521501

[1,1,1,1,1,1,1,1,17,17,53,53,413,413,6475,6475,
 139711,139711,4765521,4765521,251545591,251545591,
 21612521501]

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Last modified October 1 12:45 EDT 2022. Contains 357147 sequences. (Running on oeis4.)