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A252787 as a simple table

n a(n)
0 0
1 0
2 1
3 3
4 7
5 28
6 131
7 26465
8 2832610615
9 18602165186505644
10 1577146952504975321253720851 

[0,0,1,3,7,28,131,26465,2832610615,
 18602165186505644,1577146952504975321253720851]

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Last modified August 8 03:39 EDT 2024. Contains 375018 sequences. (Running on oeis4.)