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A147261 as a simple table

n a(n)
1 1
2 1
3 1
4 9
5 33
6 105
7 825
8 13503
9 390699
10 9339771
11 391769047
12 28305812373
13 3390227207577 

[1,1,1,9,33,105,825,13503,390699,9339771,
 391769047,28305812373,3390227207577]

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Last modified June 28 05:40 EDT 2022. Contains 354903 sequences. (Running on oeis4.)