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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.)