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A171009 as a simple table

n a(n)
1 0
2 0
3 0
4 2
5 21
6 131
7 733
8 3882
9 19641
10 97282

[0,0,0,2,21,131,733,3882,19641,97282]

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Last modified March 19 04:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)