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A089925 as a simple table

n a(n)
0 0
1 1
2 1
3 1
4 2
5 1
6 8
7 17
8 2265
9 30583
10 358335026
11 69522550106
12 55355570223093935
13 206176045800229002160 

[0,1,1,1,2,1,8,17,2265,30583,358335026,
 69522550106,55355570223093935,
 206176045800229002160]

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Last modified May 11 10:40 EDT 2024. Contains 372409 sequences. (Running on oeis4.)