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A146396 as a simple table

n a(n)
1 1
2 1
3 1
4 1
5 9
6 21
7 85
8 433
9 2775
10 20277
11 189267
12 2151189
13 36658025
14 657296273
15 17789206817 

[1,1,1,1,9,21,85,433,2775,20277,189267,2151189,
 36658025,657296273,17789206817]

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Last modified April 23 15:20 EDT 2024. Contains 371916 sequences. (Running on oeis4.)