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A367997 as a simple table

n a(n)
1 1
2 1
3 3
4 21
5 91
6 291291
7 17574557
8 1433685253
9 2819787
10 14870951705
11 124958680680282
12 3525784478869018946300814
13 27359333221 

[1,1,3,21,91,291291,17574557,1433685253,2819787,
 14870951705,124958680680282,
 3525784478869018946300814,27359333221]

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Last modified May 18 09:54 EDT 2024. Contains 372620 sequences. (Running on oeis4.)