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A057771 as a simple table

n a(n)
0 0
1 1
2 1
3 1
4 2
5 6
6 109
7 23746
8 106228849
9 9365022303540
10 20890436195945769617
11 1478157455158044452849321016 

[0,1,1,1,2,6,109,23746,106228849,9365022303540,
 20890436195945769617,1478157455158044452849321016]

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Last modified April 24 14:32 EDT 2024. Contains 371960 sequences. (Running on oeis4.)