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A006608 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 2
6 10
7 110
8 1722
9 51039
10 2560606
11 215331676
12 31067572481

[0,0,0,0,2,10,110,1722,51039,2560606,215331676,
 31067572481]

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Last modified March 28 17:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)