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A171875
as a simple table
n
a(n)
2
0
3
0
4
1
5
3
6
17
7
74
8
358
9
1631
10
7563
11
34751
12
160807
[0,0,1,3,17,74,358,1631,7563,34751,160807]
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Last modified April 17 23:23 EDT 2024. Contains 371767 sequences. (Running on oeis4.)