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A147004 as a simple table

n a(n)
1 1
2 1
3 1
4 1
5 5
6 1
7 13
8 5
9 80
10 15
11 1622
12 239
13 39282
14 4131
15 1538621
16 99155
17 127226887
18 5960881
19 16725872953
20 549694386
21 3916428224133 

[1,1,1,1,5,1,13,5,80,15,1622,239,39282,4131,
 1538621,99155,127226887,5960881,16725872953,
 549694386,3916428224133]

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Last modified June 2 00:00 EDT 2023. Contains 363078 sequences. (Running on oeis4.)